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testbed, tests, ui

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Irlan
2018-04-12 01:50:22 -03:00
parent 3c8af0060a
commit eb698f146a
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examples/testbed/framework/draw.cpp Normal file
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/*
* Copyright (c) 2016-2016 Irlan Robson http://www.irlan.net
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include <testbed/framework/draw.h>
#if defined (U_OPENGL_2)
#include <testbed/framework/draw_gl2.h>
#elif defined (U_OPENGL_4)
#include <testbed/framework/draw_gl4.h>
#else
#endif
#include <imgui/imgui.h>
Camera* g_camera = nullptr;
Draw* g_draw = nullptr;
u32 g_drawFlags = 0;
Draw::Draw()
{
m_points = new DrawPoints();
m_lines = new DrawLines();
m_triangles = new DrawTriangles();
m_wire = new DrawWire();
m_solid = new DrawSolid();
}
Draw::~Draw()
{
delete m_points;
delete m_lines;
delete m_triangles;
delete m_wire;
delete m_solid;
}
void Draw::DrawPoint(const b3Vec3& p, float32 size, const b3Color& color)
{
m_points->Vertex(p, size, color);
}
void Draw::DrawSegment(const b3Vec3& p1, const b3Vec3& p2, const b3Color& color)
{
m_lines->Vertex(p1, color);
m_lines->Vertex(p2, color);
}
void Draw::DrawTriangle(const b3Vec3& p1, const b3Vec3& p2, const b3Vec3& p3, const b3Color& color)
{
DrawSegment(p1, p2, color);
DrawSegment(p2, p3, color);
DrawSegment(p3, p1, color);
}
void Draw::DrawSolidTriangle(const b3Vec3& normal, const b3Vec3& p1, const b3Vec3& p2, const b3Vec3& p3, const b3Color& color)
{
m_triangles->Vertex(p1, color, normal);
m_triangles->Vertex(p2, color, normal);
m_triangles->Vertex(p3, color, normal);
b3Color edgeColor(0.0f, 0.0f, 0.0f, 1.0f);
DrawTriangle(p1, p2, p3, edgeColor);
}
void Draw::DrawSolidTriangle(const b3Vec3& normal, const b3Vec3& p1, const b3Color& color1, const b3Vec3& p2, const b3Color& color2, const b3Vec3& p3, const b3Color& color3)
{
m_triangles->Vertex(p1, color1, normal);
m_triangles->Vertex(p2, color2, normal);
m_triangles->Vertex(p3, color3, normal);
b3Color edgeColor(0.0f, 0.0f, 0.0f, 1.0f);
DrawTriangle(p1, p2, p3, edgeColor);
}
void Draw::DrawPolygon(const b3Vec3* vertices, u32 count, const b3Color& color)
{
b3Vec3 p1 = vertices[count - 1];
for (u32 i = 0; i < count; ++i)
{
b3Vec3 p2 = vertices[i];
m_lines->Vertex(p1, color);
m_lines->Vertex(p2, color);
p1 = p2;
}
}
void Draw::DrawSolidPolygon(const b3Vec3& normal, const b3Vec3* vertices, u32 count, const b3Color& color)
{
b3Color fillColor(color.r, color.g, color.b, color.a);
b3Vec3 p1 = vertices[0];
for (u32 i = 1; i < count - 1; ++i)
{
b3Vec3 p2 = vertices[i];
b3Vec3 p3 = vertices[i + 1];
m_triangles->Vertex(p1, fillColor, normal);
m_triangles->Vertex(p2, fillColor, normal);
m_triangles->Vertex(p3, fillColor, normal);
}
b3Color frameColor(0.5f * color.r, 0.5f * color.g, 0.5f * color.b, 1.0f);
DrawPolygon(vertices, count, frameColor);
}
void Draw::DrawCircle(const b3Vec3& normal, const b3Vec3& center, float32 radius, const b3Color& color)
{
// Build a tangent vector to normal.
b3Vec3 u = b3Cross(normal, b3Vec3(1.0f, 0.0f, 0.0f));
b3Vec3 v = b3Cross(normal, b3Vec3(0.0f, 1.0f, 0.0f));
// Handle edge cases (zero cross product).
b3Vec3 n1;
if (b3LengthSquared(u) > b3LengthSquared(v))
{
n1 = u;
}
else
{
n1 = v;
}
n1.Normalize();
// Build a quaternion to rotate the tangent about the normal.
u32 kEdgeCount = 20;
float32 kAngleInc = 2.0f * B3_PI / float32(kEdgeCount);
b3Quat q(normal, kAngleInc);
b3Vec3 p1 = center + radius * n1;
for (u32 i = 0; i < kEdgeCount; ++i)
{
b3Vec3 n2 = b3Mul(q, n1);
b3Vec3 p2 = center + radius * n2;
m_lines->Vertex(p1, color);
m_lines->Vertex(p2, color);
n1 = n2;
p1 = p2;
}
}
void Draw::DrawSolidCircle(const b3Vec3& normal, const b3Vec3& center, float32 radius, const b3Color& color)
{
b3Color fillColor(color.r, color.g, color.b, color.a);
b3Color frameColor(0.5f * color.r, 0.5f * color.g, 0.5f * color.b, 1.0f);
// Build a tangent vector to normal.
b3Vec3 u = b3Cross(normal, b3Vec3(1.0f, 0.0f, 0.0f));
b3Vec3 v = b3Cross(normal, b3Vec3(0.0f, 1.0f, 0.0f));
// Handle edge cases (zero cross product).
b3Vec3 n1;
if (b3LengthSquared(u) > b3LengthSquared(v))
{
n1 = u;
}
else
{
n1 = v;
}
n1.Normalize();
// Build a quaternion to rotate the tangent about the normal.
const u32 kEdgeCount = 20;
const float32 kAngleInc = 2.0f * B3_PI / float32(kEdgeCount);
b3Quat q(normal, kAngleInc);
b3Vec3 p1 = center + radius * n1;
for (u32 i = 0; i < kEdgeCount; ++i)
{
b3Vec3 n2 = b3Mul(q, n1);
b3Vec3 p2 = center + radius * n2;
m_triangles->Vertex(center, fillColor, normal);
m_triangles->Vertex(p1, fillColor, normal);
m_triangles->Vertex(p2, fillColor, normal);
m_lines->Vertex(p1, frameColor);
m_lines->Vertex(p2, frameColor);
n1 = n2;
p1 = p2;
}
}
void Draw::DrawSphere(const b3Vec3& center, float32 radius, const b3Color& color)
{
b3Transform xf;
xf.SetIdentity();
xf.position = center;
m_wire->DrawSphere(radius, color, xf);
}
void Draw::DrawSolidSphere(const b3Vec3& center, float32 radius, const b3Color& color)
{
b3Transform xf;
xf.SetIdentity();
xf.position = center;
m_solid->DrawSphere(radius, color, xf);
}
void Draw::DrawCapsule(const b3Vec3& c1, const b3Vec3& c2, float32 radius, const b3Color& color)
{
float32 height = b3Length(c1 - c2);
{
b3Transform xfc;
xfc.rotation.SetIdentity();
xfc.position = c1;
m_wire->DrawSphere(radius, color, xfc);
}
if (height > 0.0f)
{
DrawSegment(c1, c2, color);
{
b3Transform xfc;
xfc.rotation.SetIdentity();
xfc.position = c2;
m_wire->DrawSphere(radius, color, xfc);
}
}
}
void Draw::DrawSolidCapsule(const b3Vec3& c1, const b3Vec3& c2, float32 radius, const b3Color& c)
{
float32 height = b3Length(c1 - c2);
{
b3Transform xfc;
xfc.rotation.SetIdentity();
xfc.position = c1;
m_solid->DrawSphere(radius, c, xfc);
}
if (height > 0.0f)
{
{
b3Mat33 R;
R.y = (1.0f / height) * (c1 - c2);
R.z = b3Perp(R.y);
R.x = b3Cross(R.y, R.z);
b3Transform xfc;
xfc.position = 0.5f * (c1 + c2);
xfc.rotation = R;
m_solid->DrawCylinder(radius, height, c, xfc);
}
{
b3Transform xfc;
xfc.rotation.SetIdentity();
xfc.position = c2;
m_solid->DrawSphere(radius, c, xfc);
}
}
}
void Draw::DrawTransform(const b3Transform& xf)
{
float32 lenght = 1.0f;
b3Color red(1.0f, 0.0f, 0.0f, 1.0f);
b3Color green(0.0f, 1.0f, 0.0f, 1.0f);
b3Color blue(0.0f, 0.0f, 1.0f, 1.0f);
b3Vec3 position = xf.position;
b3Mat33 rotation = xf.rotation;
b3Vec3 A = position + lenght * rotation.x;
b3Vec3 B = position + lenght * rotation.y;
b3Vec3 C = position + lenght * rotation.z;
DrawSegment(position, A, red);
DrawSegment(position, B, green);
DrawSegment(position, C, blue);
}
void Draw::DrawAABB(const b3AABB3& aabb, const b3Color& color)
{
b3Vec3 lower = aabb.m_lower;
b3Vec3 upper = aabb.m_upper;
b3Vec3 vs[8];
vs[0] = lower;
vs[1] = b3Vec3(lower.x, upper.y, lower.z);
vs[2] = b3Vec3(upper.x, upper.y, lower.z);
vs[3] = b3Vec3(upper.x, lower.y, lower.z);
vs[4] = upper;
vs[5] = b3Vec3(upper.x, lower.y, upper.z);
vs[6] = b3Vec3(lower.x, lower.y, upper.z);
vs[7] = b3Vec3(lower.x, upper.y, upper.z);
DrawSegment(vs[0], vs[1], color);
DrawSegment(vs[1], vs[2], color);
DrawSegment(vs[2], vs[3], color);
DrawSegment(vs[3], vs[0], color);
DrawSegment(vs[4], vs[5], color);
DrawSegment(vs[5], vs[6], color);
DrawSegment(vs[6], vs[7], color);
DrawSegment(vs[7], vs[4], color);
DrawSegment(vs[2], vs[4], color);
DrawSegment(vs[5], vs[3], color);
DrawSegment(vs[6], vs[0], color);
DrawSegment(vs[1], vs[7], color);
}
void Draw::DrawString(const b3Color& color, const char* text, ...)
{
va_list args;
va_start(args, text);
ImGui::SetNextWindowPos(ImVec2(0.0f, 40.0f));
ImGui::SetNextWindowSize(ImVec2(g_camera->m_width, g_camera->m_height));
ImGui::Begin("Overlay", NULL, ImVec2(0.0f, 0.0f), 0.0f, ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoInputs | ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoScrollbar);
ImGui::TextColoredV(ImVec4(color.r, color.g, color.b, color.a), text, args);
ImGui::End();
va_end(args);
}
void Draw::DrawSolidSphere(const b3SphereShape* s, const b3Color& c, const b3Transform& xf)
{
b3Transform xfc;
xfc.rotation = xf.rotation;
xfc.position = xf * s->m_center;
m_solid->DrawSphere(s->m_radius, c, xfc);
}
void Draw::DrawSolidCapsule(const b3CapsuleShape* s, const b3Color& c, const b3Transform& xf)
{
b3Vec3 c1 = s->m_centers[0];
b3Vec3 c2 = s->m_centers[1];
float32 height = b3Length(c1 - c2);
float32 radius = s->m_radius;
{
b3Transform xfc;
xfc.rotation = xf.rotation;
xfc.position = xf * c1;
m_solid->DrawSphere(radius, c, xfc);
}
if (height > 0.0f)
{
{
b3Mat33 R;
R.y = (1.0f / height) * (c1 - c2);
R.z = b3Perp(R.y);
R.x = b3Cross(R.y, R.z);
b3Transform xfc;
xfc.position = xf * (0.5f * (c1 + c2));
xfc.rotation = xf.rotation * R;
m_solid->DrawCylinder(radius, height, c, xfc);
}
{
b3Transform xfc;
xfc.rotation = xf.rotation;
xfc.position = xf * c2;
m_solid->DrawSphere(radius, c, xfc);
}
}
}
void Draw::DrawSolidHull(const b3HullShape* s, const b3Color& c, const b3Transform& xf)
{
const b3Hull* hull = s->m_hull;
for (u32 i = 0; i < hull->faceCount; ++i)
{
const b3Face* face = hull->GetFace(i);
const b3HalfEdge* begin = hull->GetEdge(face->edge);
b3Vec3 n = xf.rotation * hull->planes[i].normal;
const b3HalfEdge* edge = hull->GetEdge(begin->next);
do
{
u32 i1 = begin->origin;
u32 i2 = edge->origin;
const b3HalfEdge* next = hull->GetEdge(edge->next);
u32 i3 = next->origin;
b3Vec3 p1 = xf * hull->vertices[i1];
b3Vec3 p2 = xf * hull->vertices[i2];
b3Vec3 p3 = xf * hull->vertices[i3];
m_triangles->Vertex(p1, c, n);
m_triangles->Vertex(p2, c, n);
m_triangles->Vertex(p3, c, n);
edge = next;
} while (hull->GetEdge(edge->next) != begin);
}
}
void Draw::DrawSolidMesh(const b3MeshShape* s, const b3Color& c, const b3Transform& xf)
{
const b3Mesh* mesh = s->m_mesh;
for (u32 i = 0; i < mesh->triangleCount; ++i)
{
const b3Triangle* t = mesh->triangles + i;
b3Vec3 p1 = xf * mesh->vertices[t->v1];
b3Vec3 p2 = xf * mesh->vertices[t->v2];
b3Vec3 p3 = xf * mesh->vertices[t->v3];
b3Vec3 n1 = b3Cross(p2 - p1, p3 - p1);
n1.Normalize();
m_triangles->Vertex(p1, c, n1);
m_triangles->Vertex(p2, c, n1);
m_triangles->Vertex(p3, c, n1);
b3Vec3 n2 = -n1;
m_triangles->Vertex(p1, c, n2);
m_triangles->Vertex(p3, c, n2);
m_triangles->Vertex(p2, c, n2);
}
}
void Draw::DrawSolidShape(const b3Shape* s, const b3Color& c, const b3Transform& xf)
{
switch (s->GetType())
{
case e_sphereShape:
{
DrawSolidSphere((b3SphereShape*)s, c, xf);
break;
}
case e_capsuleShape:
{
DrawSolidCapsule((b3CapsuleShape*)s, c, xf);
break;
}
case e_hullShape:
{
DrawSolidHull((b3HullShape*)s, c, xf);
break;
}
case e_meshShape:
{
DrawSolidMesh((b3MeshShape*)s, c, xf);
break;
}
default:
{
break;
}
}
}
void Draw::DrawSolidShapes(const b3World& world)
{
for (b3Body* b = world.GetBodyList().m_head; b; b = b->GetNext())
{
b3Color c;
if (b->IsAwake() == false)
{
c = b3Color(0.5f, 0.25f, 0.25f, 1.0f);
}
else if (b->GetType() == e_staticBody)
{
c = b3Color(0.5f, 0.5f, 0.5f, 1.0f);
}
else if (b->GetType() == e_dynamicBody)
{
c = b3Color(1.0f, 0.5f, 0.5f, 1.0f);
}
else
{
c = b3Color(0.5f, 0.5f, 1.0f, 1.0f);
}
b3Transform xf = b->GetTransform();
for (b3Shape* s = b->GetShapeList().m_head; s; s = s->GetNext())
{
DrawSolidShape(s, c, xf);
}
}
}
void Draw::Flush()
{
m_triangles->Flush();
m_lines->Flush();
m_points->Flush();
}