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Work on new OpenGL example.

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This commit is contained in:
David Williams 2009-03-18 20:44:05 +00:00
parent e32d840c50
commit a50bb8413e
4 changed files with 71 additions and 54 deletions
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2
examples/OpenGL/CMakeLists.txt
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@ -6,6 +6,7 @@ PROJECT(OpenGLExample)
SET(SRC_FILES
glew/glew.c
main.cpp
shapes.cpp
)
#Projects headers files
@ -13,6 +14,7 @@ SET(INC_FILES
glew/glew.h
glew/glxew.h
glew/wglew.h
shapes.h
)
ADD_DEFINITIONS(-DGLEW_STATIC)

46
examples/OpenGL/Shapes.cpp Normal file
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@ -0,0 +1,46 @@
#include "Shapes.h"
using namespace PolyVox;
void createSphereInVolume(BlockVolume<uint8>& volData, float fRadius, uint8 uValue)
{
//This vector hold the position of the center of the volume
Vector3DFloat v3dVolCenter(volData.getSideLength() / 2, volData.getSideLength() / 2, volData.getSideLength() / 2);
//This three-level for loop iterates over every voxel in the volume
for (int z = 0; z < volData.getSideLength(); z++)
{
for (int y = 0; y < volData.getSideLength(); y++)
{
for (int x = 0; x < volData.getSideLength(); x++)
{
//Store our current position as a vector...
Vector3DFloat v3dCurrentPos(x,y,z);
//And compute how far the current position is from the center of the volume
float fDistToCenter = (v3dCurrentPos - v3dVolCenter).length();
//If the current voxel is less than 'radius' units from the center
//then we make it solid, otherwise we make it empty space.
if(fDistToCenter <= fRadius)
{
volData.setVoxelAt(x,y,z, uValue);
}
}
}
}
}
void createCubeInVolume(BlockVolume<uint8>& volData, Vector3DUint16 lowerCorner, Vector3DUint16 upperCorner, uint8 uValue)
{
//This three-level for loop iterates over every voxel between the specified corners
for (int z = lowerCorner.getZ(); z <= upperCorner.getZ(); z++)
{
for (int y = lowerCorner.getY(); y <= upperCorner.getY(); y++)
{
for (int x = lowerCorner.getX() ; x <= upperCorner.getX(); x++)
{
volData.setVoxelAt(x,y,z, uValue);
}
}
}
}

9
examples/OpenGL/Shapes.h Normal file
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@ -0,0 +1,9 @@
#ifndef __OpenGLExample_Shapes_H__
#define __OpenGLExample_Shapes_H__
#include "PolyVoxCore/BlockVolume.h"
void createSphereInVolume(PolyVox::BlockVolume<PolyVox::uint8>& volData, float fRadius, PolyVox::uint8 uValue);
void createCubeInVolume(PolyVox::BlockVolume<PolyVox::uint8>& volData, PolyVox::Vector3DUint16 lowerCorner, PolyVox::Vector3DUint16 upperCorner, PolyVox::uint8 uValue);
#endif //__OpenGLExample_Shapes_H__

68
examples/OpenGL/main.cpp
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@ -3,9 +3,11 @@
#include "PolyVoxCore/SurfaceExtractors.h"
#include "PolyVoxCore/Utility.h"
#include "Shapes.h"
#include <windows.h> // Standard Header For Most Programs
//#define USE_OPENGL_VERTEX_BUFFERS_OBJECTS
#define USE_OPENGL_VERTEX_BUFFERS_OBJECTS
#ifdef USE_OPENGL_VERTEX_BUFFERS_OBJECTS
#ifdef WIN32
@ -154,48 +156,7 @@ OpenGLSurfacePatch BuildOpenGLSurfacePatch(IndexedSurfacePatch& isp)
}
#endif
void createSphere(float fRadius, uint8 uValue)
{
//This vector hold the position of the center of the volume
Vector3DFloat v3dVolCenter(g_volData.getSideLength() / 2, g_volData.getSideLength() / 2, g_volData.getSideLength() / 2);
//This three-level for loop iterates over every voxel in the volume
for (int z = 0; z < g_volData.getSideLength(); z++)
{
for (int y = 0; y < g_volData.getSideLength(); y++)
{
for (int x = 0; x < g_volData.getSideLength(); x++)
{
//Store our current position as a vector...
Vector3DFloat v3dCurrentPos(x,y,z);
//And compute how far the current position is from the center of the volume
float fDistToCenter = (v3dCurrentPos - v3dVolCenter).length();
//If the current voxel is less than 'radius' units from the center
//then we make it solid, otherwise we make it empty space.
if(fDistToCenter <= fRadius)
{
g_volData.setVoxelAt(x,y,z, uValue);
}
}
}
}
}
void createCube(Vector3DUint16 lowerCorner, Vector3DUint16 upperCorner, uint8 uValue)
{
//This three-level for loop iterates over every voxel between the specified corners
for (int z = lowerCorner.getZ(); z <= upperCorner.getZ(); z++)
{
for (int y = lowerCorner.getY(); y <= upperCorner.getY(); y++)
{
for (int x = lowerCorner.getX() ; x <= upperCorner.getX(); x++)
{
g_volData.setVoxelAt(x,y,z, uValue);
}
}
}
}
void timerFunc(int value)
{
@ -428,18 +389,18 @@ void main ( int argc, char** argv ) // Create Main Function For Bringing It Al
uint16 minPos = 0;
uint16 midPos = g_volData.getSideLength() / 2;
uint16 maxPos = g_volData.getSideLength() - 1;
createCube(Vector3DUint16(minPos, minPos, minPos), Vector3DUint16(maxPos, maxPos, maxPos), 0);
createCubeInVolume(g_volData, Vector3DUint16(minPos, minPos, minPos), Vector3DUint16(maxPos, maxPos, maxPos), 0);
createSphere(50.0f, 5);
createSphere(40.0f, 4);
createSphere(30.0f, 3);
createSphere(20.0f, 2);
createSphere(10.0f, 1);
createSphereInVolume(g_volData, 50.0f, 5);
createSphereInVolume(g_volData, 40.0f, 4);
createSphereInVolume(g_volData, 30.0f, 3);
createSphereInVolume(g_volData, 20.0f, 2);
createSphereInVolume(g_volData, 10.0f, 1);
createCube(Vector3DUint16(minPos, minPos, minPos), Vector3DUint16(midPos-1, midPos-1, midPos-1), 0);
createCube(Vector3DUint16(midPos+1, midPos+1, minPos), Vector3DUint16(maxPos, maxPos, midPos-1), 0);
createCube(Vector3DUint16(midPos+1, minPos, midPos+1), Vector3DUint16(maxPos, midPos-1, maxPos), 0);
createCube(Vector3DUint16(minPos, midPos+1, midPos+1), Vector3DUint16(midPos-1, maxPos, maxPos), 0);
createCubeInVolume(g_volData, Vector3DUint16(minPos, minPos, minPos), Vector3DUint16(midPos-1, midPos-1, midPos-1), 0);
createCubeInVolume(g_volData, Vector3DUint16(midPos+1, midPos+1, minPos), Vector3DUint16(maxPos, maxPos, midPos-1), 0);
createCubeInVolume(g_volData, Vector3DUint16(midPos+1, minPos, midPos+1), Vector3DUint16(maxPos, midPos-1, maxPos), 0);
createCubeInVolume(g_volData, Vector3DUint16(minPos, midPos+1, midPos+1), Vector3DUint16(midPos-1, maxPos, maxPos), 0);
//Our volume is broken down into cuboid regions, and we create one mesh for each region.
//This three-level for loop iterates over each region.
@ -483,5 +444,4 @@ void main ( int argc, char** argv ) // Create Main Function For Bringing It Al
init ();
glutMainLoop ( ); // Initialize The Main Loop
}
}