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Work on new OpenGL example - got basic different materials working.

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This commit is contained in:
David Williams 2009-03-15 17:31:30 +00:00
parent def987450c
commit 8ec128d73f
1 changed files with 78 additions and 8 deletions
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86
examples/OpenGL/main.cpp
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@ -35,7 +35,7 @@ IndexedSurfacePatch* g_ispRegionSurfaces[g_uVolumeSideLengthInRegions][g_uVolume
GLuint indexBuffers[g_uVolumeSideLengthInRegions][g_uVolumeSideLengthInRegions][g_uVolumeSideLengthInRegions];
GLuint vertexBuffers[g_uVolumeSideLengthInRegions][g_uVolumeSideLengthInRegions][g_uVolumeSideLengthInRegions];
void createSphereInVolume(float fRadius, uint8 uValue)
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);
@ -58,10 +58,21 @@ void createSphereInVolume(float fRadius, uint8 uValue)
{
g_volData.setVoxelAt(x,y,z, uValue);
}
else
{
g_volData.setVoxelAt(x,y,z, 0);
}
}
}
}
}
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);
}
}
}
@ -94,15 +105,18 @@ void display ( void ) // Create The Display Function
const vector<uint32>& vecIndices = g_ispRegionSurfaces[uRegionX][uRegionY][uRegionZ]->getIndices();
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffers[uRegionX][uRegionY][uRegionZ]);
glVertexPointer(3, GL_FLOAT, 0, 0);
glVertexPointer(3, GL_FLOAT, 24, 0);
glColorPointer(3, GL_FLOAT, 24, (GLvoid*)12);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffers[uRegionX][uRegionY][uRegionZ]);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
int s = vecIndices.size();
glDrawElements(GL_TRIANGLE_STRIP, s, GL_UNSIGNED_INT, 0);
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
}
}
@ -185,7 +199,21 @@ void main ( int argc, char** argv ) // Create Main Function For Bringing It Al
#endif
//Make our volume contain a sphere in the center.
createSphereInVolume(50.0f, 1);
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);
createSphere(50.0f, 5);
createSphere(40.0f, 4);
createSphere(30.0f, 3);
createSphere(20.0f, 2);
createSphere(10.0f, 1);
createCube(Vector3DUint16(minPos, minPos, minPos), Vector3DUint16(midPos, midPos, midPos), 0);
createCube(Vector3DUint16(midPos, midPos, minPos), Vector3DUint16(maxPos, maxPos, midPos), 0);
createCube(Vector3DUint16(midPos, minPos, midPos), Vector3DUint16(maxPos, midPos, maxPos), 0);
createCube(Vector3DUint16(minPos, midPos, midPos), Vector3DUint16(midPos, 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.
@ -230,7 +258,7 @@ void main ( int argc, char** argv ) // Create Main Function For Bringing It Al
glGenBuffers(1, &(vertexBuffers[uRegionX][uRegionY][uRegionZ]));
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffers[uRegionX][uRegionY][uRegionZ]);
glBufferData(GL_ARRAY_BUFFER, vecVertices.size() * sizeof(GLfloat) * 3, 0, GL_STATIC_DRAW);
glBufferData(GL_ARRAY_BUFFER, vecVertices.size() * sizeof(GLfloat) * 6, 0, GL_STATIC_DRAW);
GLfloat* ptr = (GLfloat*)glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
for(vector<SurfaceVertex>::const_iterator iterVertex = vecVertices.begin(); iterVertex != vecVertices.end(); ++iterVertex)
@ -246,6 +274,48 @@ void main ( int argc, char** argv ) // Create Main Function For Bringing It Al
ptr++;
*ptr = v3dFinalVertexPos.getZ();
ptr++;
GLfloat red = 1.0f;
GLfloat green = 0.0f;
GLfloat blue = 0.0f;
uint8 material = vertex.getMaterial() + 0.5;
switch(material)
{
case 1:
red = 1.0;
green = 0.0;
blue = 0.0;
break;
case 2:
red = 0.0;
green = 1.0;
blue = 0.0;
break;
case 3:
red = 0.0;
green = 0.0;
blue = 1.0;
break;
case 4:
red = 1.0;
green = 1.0;
blue = 0.0;
break;
case 5:
red = 1.0;
green = 0.0;
blue = 1.0;
break;
}
*ptr = red;
ptr++;
*ptr = green;
ptr++;
*ptr = blue;
ptr++;
}
glUnmapBuffer(GL_ARRAY_BUFFER);