878 lines
21 KiB
C
878 lines
21 KiB
C
/*
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* Copyright (c) 2016-2019 Irlan Robson https://irlanrobson.github.io
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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#ifndef DRAW_GL2_H
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#define DRAW_GL2_H
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#include <glad_2/glad.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <bounce/common/math/transform.h>
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#include <bounce/common/math/mat44.h>
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#include <bounce/common/draw.h>
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#include <bounce/meshgen/sphere_mesh.h>
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#include <bounce/meshgen/cylinder_mesh.h>
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#define BUFFER_OFFSET(i) ((char*)NULL + (i))
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extern bool g_glDrawPoints;
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extern bool g_glDrawLines;
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extern bool g_glDrawTriangles;
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extern b3Mat44 g_glViewMatrix;
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extern b3Mat44 g_glProjectionMatrix;
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static void AssertGL()
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{
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GLenum errorCode = glGetError();
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if (errorCode != GL_NO_ERROR)
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{
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fprintf(stderr, "OpenGL error = %d\n", errorCode);
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assert(false);
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}
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}
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static void PrintLog(GLuint id)
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{
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GLint log_length = 0;
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if (glIsShader(id))
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{
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glGetShaderiv(id, GL_INFO_LOG_LENGTH, &log_length);
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}
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else if (glIsProgram(id))
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{
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glGetProgramiv(id, GL_INFO_LOG_LENGTH, &log_length);
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}
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else
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{
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fprintf(stderr, "Not a shader or a program\n");
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return;
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}
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char* log = (char*)malloc(log_length);
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if (glIsShader(id))
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{
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glGetShaderInfoLog(id, log_length, NULL, log);
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}
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else if (glIsProgram(id))
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{
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glGetProgramInfoLog(id, log_length, NULL, log);
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}
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fprintf(stderr, "%s", log);
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free(log);
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}
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static GLuint CreateShader(const char* source, GLenum type)
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{
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GLuint shaderId = glCreateShader(type);
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const char* sources[] = { source };
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glShaderSource(shaderId, 1, sources, NULL);
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glCompileShader(shaderId);
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GLint status = GL_FALSE;
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glGetShaderiv(shaderId, GL_COMPILE_STATUS, &status);
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if (status == GL_FALSE)
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{
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fprintf(stderr, "Error compiling %d shader.\n", type);
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PrintLog(shaderId);
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glDeleteShader(shaderId);
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return 0;
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}
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return shaderId;
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}
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//
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static GLuint CreateShaderProgram(const char* vs, const char* fs)
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{
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GLuint vsId = CreateShader(vs, GL_VERTEX_SHADER);
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GLuint fsId = CreateShader(fs, GL_FRAGMENT_SHADER);
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assert(vsId != 0 && fsId != 0);
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GLuint programId = glCreateProgram();
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glAttachShader(programId, vsId);
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glAttachShader(programId, fsId);
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glLinkProgram(programId);
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glDeleteShader(vsId);
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glDeleteShader(fsId);
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GLint status = GL_FALSE;
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glGetProgramiv(programId, GL_LINK_STATUS, &status);
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assert(status != GL_FALSE);
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return programId;
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}
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struct DrawPoints
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{
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DrawPoints()
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{
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const char* vs = \
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"#version 120\n"
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"uniform mat4 projectionMatrix;\n"
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"attribute vec3 v_position;\n"
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"attribute vec4 v_color;\n"
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"attribute float v_size;\n"
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"varying vec4 f_color;\n"
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"void main()\n"
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"{\n"
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" f_color = v_color;\n"
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" gl_Position = projectionMatrix * vec4(v_position, 1.0f);\n"
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" gl_PointSize = v_size;\n"
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"}\n";
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const char* fs = \
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"#version 120\n"
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"varying vec4 f_color;\n"
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"void main(void)\n"
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"{\n"
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" gl_FragColor = f_color;\n"
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"}\n";
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m_programId = CreateShaderProgram(vs, fs);
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m_projectionUniform = glGetUniformLocation(m_programId, "projectionMatrix");
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m_vertexAttribute = glGetAttribLocation(m_programId, "v_position");
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m_colorAttribute = glGetAttribLocation(m_programId, "v_color");
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m_sizeAttribute = glGetAttribLocation(m_programId, "v_size");
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glGenBuffers(3, m_vboIds);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[0]);
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glBufferData(GL_ARRAY_BUFFER, e_vertexCapacity * sizeof(b3Vec3), m_vertices, GL_DYNAMIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[1]);
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glBufferData(GL_ARRAY_BUFFER, e_vertexCapacity * sizeof(b3Color), m_colors, GL_DYNAMIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[2]);
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glBufferData(GL_ARRAY_BUFFER, e_vertexCapacity * sizeof(scalar), m_sizes, GL_DYNAMIC_DRAW);
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AssertGL();
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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m_count = 0;
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}
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~DrawPoints()
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{
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glDeleteProgram(m_programId);
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glDeleteBuffers(3, m_vboIds);
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}
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void Vertex(const b3Vec3& v, scalar size, const b3Color& color)
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{
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if (m_count == e_vertexCapacity)
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{
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Flush();
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}
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m_vertices[m_count] = v;
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m_colors[m_count] = color;
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m_sizes[m_count] = size;
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++m_count;
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}
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void Flush()
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{
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if (m_count == 0)
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{
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return;
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}
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if (!g_glDrawPoints)
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{
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m_count = 0;
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return;
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}
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glUseProgram(m_programId);
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b3Mat44 m1 = g_glViewMatrix;
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b3Mat44 m2 = g_glProjectionMatrix;
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b3Mat44 m = m2 * m1;
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glUniformMatrix4fv(m_projectionUniform, 1, GL_FALSE, &m.x.x);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[0]);
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glBufferSubData(GL_ARRAY_BUFFER, 0, m_count * sizeof(b3Vec3), m_vertices);
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glVertexAttribPointer(m_vertexAttribute, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
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glEnableVertexAttribArray(m_vertexAttribute);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[1]);
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glBufferSubData(GL_ARRAY_BUFFER, 0, m_count * sizeof(b3Color), m_colors);
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glEnableVertexAttribArray(m_colorAttribute);
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glVertexAttribPointer(m_colorAttribute, 4, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[2]);
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glBufferSubData(GL_ARRAY_BUFFER, 0, m_count * sizeof(scalar), m_sizes);
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glEnableVertexAttribArray(m_sizeAttribute);
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glVertexAttribPointer(m_sizeAttribute, 1, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
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glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
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glDrawArrays(GL_POINTS, 0, m_count);
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glDisable(GL_VERTEX_PROGRAM_POINT_SIZE);
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glDisableVertexAttribArray(m_sizeAttribute);
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glDisableVertexAttribArray(m_colorAttribute);
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glDisableVertexAttribArray(m_vertexAttribute);
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AssertGL();
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glUseProgram(0);
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m_count = 0;
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}
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enum
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{
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e_vertexCapacity = 1024
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};
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b3Vec3 m_vertices[e_vertexCapacity];
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b3Color m_colors[e_vertexCapacity];
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scalar m_sizes[e_vertexCapacity];
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u32 m_count;
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GLuint m_programId;
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GLuint m_projectionUniform;
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GLuint m_vertexAttribute;
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GLuint m_colorAttribute;
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GLuint m_sizeAttribute;
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GLuint m_vboIds[3];
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};
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struct DrawLines
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{
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DrawLines()
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{
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const char* vs = \
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"#version 120\n"
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"uniform mat4 projectionMatrix;\n"
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"attribute vec3 v_position;\n"
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"attribute vec4 v_color;\n"
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"varying vec4 f_color;\n"
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"void main(void)\n"
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"{\n"
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" f_color = v_color;\n"
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" gl_Position = projectionMatrix * vec4(v_position, 1.0f);\n"
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"}\n";
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const char* fs = \
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"#version 120\n"
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"varying vec4 f_color;\n"
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"void main(void)\n"
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"{\n"
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" gl_FragColor = f_color;\n"
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"}\n";
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m_programId = CreateShaderProgram(vs, fs);
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m_projectionUniform = glGetUniformLocation(m_programId, "projectionMatrix");
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m_vertexAttribute = glGetAttribLocation(m_programId, "v_position");
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m_colorAttribute = glGetAttribLocation(m_programId, "v_color");
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glGenBuffers(2, m_vboIds);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[0]);
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glBufferData(GL_ARRAY_BUFFER, e_vertexCapacity * sizeof(b3Vec3), m_vertices, GL_DYNAMIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[1]);
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glBufferData(GL_ARRAY_BUFFER, e_vertexCapacity * sizeof(b3Color), m_colors, GL_DYNAMIC_DRAW);
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AssertGL();
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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m_count = 0;
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}
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~DrawLines()
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{
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glDeleteProgram(m_programId);
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glDeleteBuffers(2, m_vboIds);
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}
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void Vertex(const b3Vec3& v, const b3Color& c)
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{
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if (m_count == e_vertexCapacity)
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{
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Flush();
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}
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m_vertices[m_count] = v;
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m_colors[m_count] = c;
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++m_count;
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}
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void Flush()
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{
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if (m_count == 0)
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{
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return;
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}
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if (!g_glDrawLines)
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{
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m_count = 0;
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return;
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}
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glUseProgram(m_programId);
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b3Mat44 m1 = g_glViewMatrix;
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b3Mat44 m2 = g_glProjectionMatrix;
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b3Mat44 m = m2 * m1;
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glUniformMatrix4fv(m_projectionUniform, 1, GL_FALSE, &m.x.x);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[0]);
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glBufferSubData(GL_ARRAY_BUFFER, 0, m_count * sizeof(b3Vec3), m_vertices);
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glVertexAttribPointer(m_vertexAttribute, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
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glEnableVertexAttribArray(m_vertexAttribute);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[1]);
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glBufferSubData(GL_ARRAY_BUFFER, 0, m_count * sizeof(b3Color), m_colors);
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glEnableVertexAttribArray(m_colorAttribute);
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glVertexAttribPointer(m_colorAttribute, 4, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
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glDrawArrays(GL_LINES, 0, m_count);
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AssertGL();
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glDisableVertexAttribArray(m_colorAttribute);
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glDisableVertexAttribArray(m_vertexAttribute);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glUseProgram(0);
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m_count = 0;
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}
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enum
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{
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e_vertexCapacity = 2 * 1024
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};
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b3Vec3 m_vertices[e_vertexCapacity];
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b3Color m_colors[e_vertexCapacity];
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u32 m_count;
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GLuint m_programId;
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GLuint m_projectionUniform;
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GLuint m_vertexAttribute;
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GLuint m_colorAttribute;
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GLuint m_vboIds[2];
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};
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struct DrawTriangles
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{
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DrawTriangles()
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{
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const char* vs = \
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"#version 120\n"
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"uniform mat4 projectionMatrix;\n"
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"attribute vec3 v_position;\n"
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"attribute vec4 v_color;\n"
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"attribute vec3 v_normal;\n"
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"varying vec4 f_color;\n"
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"void main(void)\n"
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"{\n"
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" vec3 La = vec3(0.5f, 0.5f, 0.5f);\n"
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" vec3 Ld = vec3(0.5f, 0.5f, 0.5f);\n"
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" vec3 L = vec3(0.0f, 0.3f, 0.7f);\n"
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" vec3 Ma = v_color.xyz;\n"
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" vec3 Md = v_color.xyz;\n"
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" vec3 a = La * Ma;\n"
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" vec3 d = max(dot(v_normal, L), 0.0f) * Ld * Md;\n"
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" f_color = vec4(a + d, v_color.w);\n"
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" gl_Position = projectionMatrix * vec4(v_position, 1.0f);\n"
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"}\n";
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const char* fs = \
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"#version 120\n"
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"varying vec4 f_color;\n"
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"void main(void)\n"
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"{\n"
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" gl_FragColor = f_color;\n"
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"}\n";
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m_programId = CreateShaderProgram(vs, fs);
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m_projectionUniform = glGetUniformLocation(m_programId, "projectionMatrix");
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m_vertexAttribute = glGetAttribLocation(m_programId, "v_position");
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m_colorAttribute = glGetAttribLocation(m_programId, "v_color");
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m_normalAttribute = glGetAttribLocation(m_programId, "v_normal");
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glGenBuffers(3, m_vboIds);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[0]);
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glBufferData(GL_ARRAY_BUFFER, e_vertexCapacity * sizeof(b3Vec3), m_vertices, GL_DYNAMIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[1]);
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glBufferData(GL_ARRAY_BUFFER, e_vertexCapacity * sizeof(b3Color), m_colors, GL_DYNAMIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[2]);
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glBufferData(GL_ARRAY_BUFFER, e_vertexCapacity * sizeof(b3Vec3), m_normals, GL_DYNAMIC_DRAW);
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AssertGL();
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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m_count = 0;
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}
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~DrawTriangles()
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{
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glDeleteProgram(m_programId);
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glDeleteBuffers(3, m_vboIds);
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}
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void Vertex(const b3Vec3& v, const b3Color& c, const b3Vec3& n)
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{
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if (m_count == e_vertexCapacity)
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{
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Flush();
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}
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m_vertices[m_count] = v;
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m_colors[m_count] = c;
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m_normals[m_count] = n;
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++m_count;
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}
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void Flush()
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{
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if (m_count == 0)
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{
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return;
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}
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if (!g_glDrawTriangles)
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{
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m_count = 0;
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return;
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}
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glUseProgram(m_programId);
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b3Mat44 m1 = g_glViewMatrix;
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b3Mat44 m2 = g_glProjectionMatrix;
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b3Mat44 m = m2 * m1;
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glUniformMatrix4fv(m_projectionUniform, 1, GL_FALSE, &m.x.x);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[0]);
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glBufferSubData(GL_ARRAY_BUFFER, 0, m_count * sizeof(b3Vec3), m_vertices);
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glVertexAttribPointer(m_vertexAttribute, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
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glEnableVertexAttribArray(m_vertexAttribute);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[1]);
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glBufferSubData(GL_ARRAY_BUFFER, 0, m_count * sizeof(b3Color), m_colors);
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glVertexAttribPointer(m_colorAttribute, 4, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
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glEnableVertexAttribArray(m_colorAttribute);
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glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[2]);
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glBufferSubData(GL_ARRAY_BUFFER, 0, m_count * sizeof(b3Vec3), m_normals);
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glVertexAttribPointer(m_normalAttribute, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
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glEnableVertexAttribArray(m_normalAttribute);
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glDrawArrays(GL_TRIANGLES, 0, m_count);
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AssertGL();
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glDisableVertexAttribArray(m_normalAttribute);
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glDisableVertexAttribArray(m_colorAttribute);
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glDisableVertexAttribArray(m_vertexAttribute);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glUseProgram(0);
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m_count = 0;
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}
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enum
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{
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e_vertexCapacity = 3 * 512
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};
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b3Vec3 m_vertices[e_vertexCapacity];
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b3Color m_colors[e_vertexCapacity];
|
|
b3Vec3 m_normals[e_vertexCapacity];
|
|
u32 m_count;
|
|
|
|
GLuint m_programId;
|
|
GLuint m_projectionUniform;
|
|
GLuint m_vertexAttribute;
|
|
GLuint m_colorAttribute;
|
|
GLuint m_normalAttribute;
|
|
|
|
GLuint m_vboIds[3];
|
|
};
|
|
|
|
struct DrawWireSphere
|
|
{
|
|
DrawWireSphere()
|
|
{
|
|
smMesh mesh;
|
|
smCreateMesh(mesh, 2);
|
|
|
|
m_vertexCount = mesh.vertexCount;
|
|
m_indexCount = mesh.indexCount;
|
|
|
|
glGenBuffers(1, &m_vboId);
|
|
glGenBuffers(1, &m_iboId);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_vboId);
|
|
glBufferData(GL_ARRAY_BUFFER, m_vertexCount * sizeof(b3Vec3), mesh.vertices, GL_STATIC_DRAW);
|
|
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_iboId);
|
|
glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_indexCount * sizeof(u32), mesh.indices, GL_STATIC_DRAW);
|
|
|
|
AssertGL();
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
}
|
|
|
|
~DrawWireSphere()
|
|
{
|
|
glDeleteBuffers(1, &m_vboId);
|
|
glDeleteBuffers(1, &m_iboId);
|
|
}
|
|
|
|
GLuint m_vboId;
|
|
GLuint m_iboId;
|
|
u32 m_vertexCount;
|
|
u32 m_indexCount;
|
|
};
|
|
|
|
struct DrawWire
|
|
{
|
|
DrawWire()
|
|
{
|
|
const char* vs = \
|
|
"#version 120\n"
|
|
"uniform vec4 color;\n"
|
|
"uniform mat4 projectionMatrix;\n"
|
|
"attribute vec3 v_position;\n"
|
|
"varying vec4 f_color;\n"
|
|
"void main(void)\n"
|
|
"{\n"
|
|
" f_color = color;\n"
|
|
" gl_Position = projectionMatrix * vec4(v_position, 1.0f);\n"
|
|
"}\n";
|
|
|
|
const char* fs = \
|
|
"#version 120\n"
|
|
"varying vec4 f_color;\n"
|
|
"void main(void)\n"
|
|
"{\n"
|
|
" gl_FragColor = f_color;\n"
|
|
"}\n";
|
|
|
|
m_programId = CreateShaderProgram(vs, fs);
|
|
m_colorUniform = glGetUniformLocation(m_programId, "color");
|
|
m_projectionUniform = glGetUniformLocation(m_programId, "projectionMatrix");
|
|
m_vertexAttribute = glGetAttribLocation(m_programId, "v_position");
|
|
}
|
|
|
|
~DrawWire()
|
|
{
|
|
glDeleteProgram(m_programId);
|
|
}
|
|
|
|
void DrawSphere(scalar radius, const b3Color& c, const b3Transform& xf)
|
|
{
|
|
if (!g_glDrawLines)
|
|
{
|
|
return;
|
|
}
|
|
|
|
glUseProgram(m_programId);
|
|
|
|
b3Mat44 m1 = b3TransformMat44(xf);
|
|
m1.x = radius * m1.x;
|
|
m1.y = radius * m1.y;
|
|
m1.z = radius * m1.z;
|
|
b3Mat44 m2 = g_glViewMatrix;
|
|
b3Mat44 m3 = g_glProjectionMatrix;
|
|
b3Mat44 m = m3 * m2 * m1;
|
|
|
|
glUniform4fv(m_colorUniform, 1, &c.r);
|
|
glUniformMatrix4fv(m_projectionUniform, 1, GL_FALSE, &m.x.x);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_sphere.m_vboId);
|
|
glVertexAttribPointer(m_vertexAttribute, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
|
|
glEnableVertexAttribArray(m_vertexAttribute);
|
|
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_sphere.m_iboId);
|
|
glDrawElements(GL_LINES, m_sphere.m_indexCount, GL_UNSIGNED_INT, BUFFER_OFFSET(0));
|
|
|
|
glDisableVertexAttribArray(m_vertexAttribute);
|
|
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
|
|
glUseProgram(0);
|
|
}
|
|
|
|
GLuint m_programId;
|
|
GLuint m_colorUniform;
|
|
GLuint m_projectionUniform;
|
|
GLuint m_vertexAttribute;
|
|
|
|
DrawWireSphere m_sphere;
|
|
};
|
|
|
|
struct DrawSolidSphere
|
|
{
|
|
DrawSolidSphere()
|
|
{
|
|
smMesh mesh;
|
|
smCreateMesh(mesh, 2);
|
|
|
|
m_vertexCount = mesh.vertexCount;
|
|
m_indexCount = mesh.indexCount;
|
|
|
|
glGenBuffers(3, m_vboIds);
|
|
glGenBuffers(1, &m_iboId);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[0]);
|
|
glBufferData(GL_ARRAY_BUFFER, m_vertexCount * sizeof(b3Vec3), mesh.vertices, GL_STATIC_DRAW);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[1]);
|
|
glBufferData(GL_ARRAY_BUFFER, m_vertexCount * sizeof(b3Vec3), mesh.normals, GL_STATIC_DRAW);
|
|
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_iboId);
|
|
glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_indexCount * sizeof(u32), mesh.indices, GL_STATIC_DRAW);
|
|
|
|
AssertGL();
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
}
|
|
|
|
~DrawSolidSphere()
|
|
{
|
|
glDeleteBuffers(2, m_vboIds);
|
|
glDeleteBuffers(1, &m_iboId);
|
|
}
|
|
|
|
GLuint m_vboIds[2];
|
|
GLuint m_iboId;
|
|
u32 m_vertexCount;
|
|
u32 m_indexCount;
|
|
};
|
|
|
|
struct DrawSolidCylinder
|
|
{
|
|
DrawSolidCylinder()
|
|
{
|
|
cymMesh mesh;
|
|
cymCreateMesh(mesh, 20);
|
|
|
|
m_vertexCount = mesh.vertexCount;
|
|
m_indexCount = mesh.indexCount;
|
|
|
|
glGenBuffers(2, m_vboIds);
|
|
glGenBuffers(1, &m_iboId);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[0]);
|
|
glBufferData(GL_ARRAY_BUFFER, m_vertexCount * sizeof(b3Vec3), mesh.vertices, GL_STATIC_DRAW);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_vboIds[1]);
|
|
glBufferData(GL_ARRAY_BUFFER, m_vertexCount * sizeof(b3Vec3), mesh.normals, GL_STATIC_DRAW);
|
|
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_iboId);
|
|
glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_indexCount * sizeof(u32), mesh.indices, GL_STATIC_DRAW);
|
|
|
|
AssertGL();
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
}
|
|
|
|
~DrawSolidCylinder()
|
|
{
|
|
glDeleteBuffers(2, m_vboIds);
|
|
glDeleteBuffers(1, &m_iboId);
|
|
}
|
|
|
|
GLuint m_vboIds[2];
|
|
GLuint m_iboId;
|
|
u32 m_vertexCount;
|
|
u32 m_indexCount;
|
|
};
|
|
|
|
struct DrawSolid
|
|
{
|
|
DrawSolid()
|
|
{
|
|
const char* vs = \
|
|
"#version 120\n"
|
|
"uniform vec4 color;\n"
|
|
"uniform mat4 modelMatrix;\n"
|
|
"uniform mat4 projectionMatrix;\n"
|
|
"attribute vec3 v_position;\n"
|
|
"attribute vec3 v_normal;\n"
|
|
"varying vec4 f_color;\n"
|
|
"void main(void)\n"
|
|
"{\n"
|
|
" vec3 f_normal = normalize( ( modelMatrix * vec4(v_normal, 0.0f) ).xyz );\n"
|
|
" gl_Position = projectionMatrix * vec4(v_position, 1.0f);\n"
|
|
" vec3 La = vec3(0.5f, 0.5f, 0.5f);\n"
|
|
" vec3 Ld = vec3(0.5f, 0.5f, 0.5f);\n"
|
|
" vec3 L = vec3(0.0f, 0.3f, 0.7f);\n"
|
|
" vec3 Ma = color.xyz;\n"
|
|
" vec3 Md = color.xyz;\n"
|
|
" vec3 a = La * Ma;\n"
|
|
" vec3 d = max(dot(f_normal, L), 0.0f) * Ld * Md;\n"
|
|
" f_color = vec4(a + d, color.w);\n"
|
|
"}\n";
|
|
|
|
const char* fs = \
|
|
"#version 120\n"
|
|
"varying vec4 f_color;\n"
|
|
"void main(void)\n"
|
|
"{\n"
|
|
" gl_FragColor = f_color;\n"
|
|
"}\n";
|
|
|
|
m_programId = CreateShaderProgram(vs, fs);
|
|
m_colorUniform = glGetUniformLocation(m_programId, "color");
|
|
m_modelUniform = glGetUniformLocation(m_programId, "modelMatrix");
|
|
m_projectionUniform = glGetUniformLocation(m_programId, "projectionMatrix");
|
|
m_vertexAttribute = glGetAttribLocation(m_programId, "v_position");
|
|
m_normalAttribute = glGetAttribLocation(m_programId, "v_normal");
|
|
}
|
|
|
|
~DrawSolid()
|
|
{
|
|
}
|
|
|
|
void DrawCylinder(scalar radius, scalar height, const b3Color& c, const b3Transform& xf)
|
|
{
|
|
if (!g_glDrawTriangles)
|
|
{
|
|
return;
|
|
}
|
|
|
|
glUseProgram(m_programId);
|
|
|
|
b3Mat44 m1 = b3TransformMat44(xf);
|
|
m1.x = radius * m1.x;
|
|
m1.y = height * m1.y;
|
|
m1.z = radius * m1.z;
|
|
|
|
b3Mat44 m2 = g_glViewMatrix;
|
|
b3Mat44 m3 = g_glProjectionMatrix;
|
|
b3Mat44 m = m3 * m2 * m1;
|
|
|
|
glUniform4fv(m_colorUniform, 1, &c.r);
|
|
glUniformMatrix4fv(m_modelUniform, 1, GL_FALSE, &m1.x.x);
|
|
glUniformMatrix4fv(m_projectionUniform, 1, GL_FALSE, &m.x.x);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_cylinder.m_vboIds[0]);
|
|
glVertexAttribPointer(m_vertexAttribute, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
|
|
glEnableVertexAttribArray(m_vertexAttribute);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_cylinder.m_vboIds[1]);
|
|
glVertexAttribPointer(m_normalAttribute, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
|
|
glEnableVertexAttribArray(m_normalAttribute);
|
|
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_cylinder.m_iboId);
|
|
glDrawElements(GL_TRIANGLES, m_cylinder.m_indexCount, GL_UNSIGNED_INT, BUFFER_OFFSET(0));
|
|
|
|
glDisableVertexAttribArray(m_normalAttribute);
|
|
|
|
glDisableVertexAttribArray(m_vertexAttribute);
|
|
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
|
|
glUseProgram(0);
|
|
}
|
|
|
|
void DrawSphere(scalar radius, const b3Color& c, const b3Transform& xf)
|
|
{
|
|
if (!g_glDrawTriangles)
|
|
{
|
|
return;
|
|
}
|
|
|
|
glUseProgram(m_programId);
|
|
|
|
b3Mat44 m1 = b3TransformMat44(xf);
|
|
m1.x = radius * m1.x;
|
|
m1.y = radius * m1.y;
|
|
m1.z = radius * m1.z;
|
|
|
|
b3Mat44 m2 = g_glViewMatrix;
|
|
b3Mat44 m3 = g_glProjectionMatrix;
|
|
b3Mat44 m = m3 * m2 * m1;
|
|
|
|
glUniform4fv(m_colorUniform, 1, &c.r);
|
|
glUniformMatrix4fv(m_modelUniform, 1, GL_FALSE, &m1.x.x);
|
|
glUniformMatrix4fv(m_projectionUniform, 1, GL_FALSE, &m.x.x);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_sphere.m_vboIds[0]);
|
|
glVertexAttribPointer(m_vertexAttribute, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
|
|
glEnableVertexAttribArray(m_vertexAttribute);
|
|
|
|
glBindBuffer(GL_ARRAY_BUFFER, m_sphere.m_vboIds[1]);
|
|
glVertexAttribPointer(m_normalAttribute, 3, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
|
|
glEnableVertexAttribArray(m_normalAttribute);
|
|
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_sphere.m_iboId);
|
|
glDrawElements(GL_TRIANGLES, m_sphere.m_indexCount, GL_UNSIGNED_INT, BUFFER_OFFSET(0));
|
|
|
|
glDisableVertexAttribArray(m_normalAttribute);
|
|
|
|
glDisableVertexAttribArray(m_vertexAttribute);
|
|
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
|
|
glUseProgram(0);
|
|
}
|
|
|
|
GLuint m_programId;
|
|
GLuint m_colorUniform;
|
|
GLuint m_modelUniform;
|
|
GLuint m_projectionUniform;
|
|
GLuint m_vertexAttribute;
|
|
GLuint m_normalAttribute;
|
|
|
|
DrawSolidSphere m_sphere;
|
|
DrawSolidCylinder m_cylinder;
|
|
};
|
|
|
|
#endif
|