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Some tidying up op OpenGL example.

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This commit is contained in:
David Williams 2008-06-11 21:49:46 +00:00
parent 2f5d9e5ab2
commit 2657d5ba6f
1 changed files with 32 additions and 21 deletions
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53
examples/OpenGL/main.cpp
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@ -16,8 +16,14 @@ using namespace std;
//Global variables are easier for demonstration purposes, especially //Global variables are easier for demonstration purposes, especially
//as I'm not sure how/if I can pass variables to the GLUT functions. //as I'm not sure how/if I can pass variables to the GLUT functions.
const uint16_t g_uVolumeSideLength = 128; const uint16_t g_uVolumeSideLength = 128;
BlockVolume<uint8_t> g_volData(logBase2(g_uVolumeSideLength)); //Creates a volume 128x128x128 const uint16_t g_uRegionSideLength = 16;
IndexedSurfacePatch* g_ispRegionSurfaces[8][8][8]; const uint16_t g_uVolumeSideLengthInRegions = g_uVolumeSideLength / g_uRegionSideLength;
//Creates a volume 128x128x128
BlockVolume<uint8_t> g_volData(logBase2(g_uVolumeSideLength));
//Rather than storing one big mesh, the volume is broken into regions and a mesh is stored for each region
IndexedSurfacePatch* g_ispRegionSurfaces[g_uVolumeSideLengthInRegions][g_uVolumeSideLengthInRegions][g_uVolumeSideLengthInRegions];
void createSphereInVolume(void) void createSphereInVolume(void)
{ {
@ -70,19 +76,21 @@ void display ( void ) // Create The Display Function
glTranslatef(-g_uVolumeSideLength/2,-g_uVolumeSideLength/2,-200.0f); glTranslatef(-g_uVolumeSideLength/2,-g_uVolumeSideLength/2,-200.0f);
glBegin(GL_TRIANGLES); glBegin(GL_TRIANGLES);
for(uint16_t z = 0; z < 8; ++z) for(uint16_t uRegionZ = 0; uRegionZ < g_uVolumeSideLengthInRegions; ++uRegionZ)
{ {
for(uint16_t y = 0; y < 8; ++y) for(uint16_t uRegionY = 0; uRegionY < g_uVolumeSideLengthInRegions; ++uRegionY)
{ {
for(uint16_t x = 0; x < 8; ++x) for(uint16_t uRegionX = 0; uRegionX < g_uVolumeSideLengthInRegions; ++uRegionX)
{ {
const vector<SurfaceVertex>& vertices = g_ispRegionSurfaces[x][y][z]->getVertices(); const vector<SurfaceVertex>& vecVertices = g_ispRegionSurfaces[uRegionX][uRegionY][uRegionZ]->getVertices();
const vector<uint32_t>& indices = g_ispRegionSurfaces[x][y][z]->getIndices(); const vector<uint32_t>& vecIndices = g_ispRegionSurfaces[uRegionX][uRegionY][uRegionZ]->getIndices();
for(vector<uint32_t>::const_iterator indexIter = indices.begin(); indexIter != indices.end(); ++indexIter) for(vector<uint32_t>::const_iterator iterIndex = vecIndices.begin(); iterIndex != vecIndices.end(); ++iterIndex)
{ {
const SurfaceVertex& vertex = vertices[*indexIter]; const SurfaceVertex& vertex = vecVertices[*iterIndex];
const Vector3DFloat& vertexPos = vertex.getPosition(); const Vector3DFloat& v3dVertexPos = vertex.getPosition();
glVertex3f(vertexPos.getX() + (x*16), vertexPos.getY() + (y*16), vertexPos.getZ() + (z*16)); const Vector3DFloat v3dRegionOffset(uRegionX * g_uRegionSideLength, uRegionY * g_uRegionSideLength, uRegionZ * g_uRegionSideLength);
const Vector3DFloat v3dFinalVertexPos = v3dVertexPos + v3dRegionOffset;
glVertex3f(v3dFinalVertexPos.getX(), v3dFinalVertexPos.getY(), v3dFinalVertexPos.getZ());
} }
} }
} }
@ -136,14 +144,17 @@ void main ( int argc, char** argv ) // Create Main Function For Bringing It Al
{ {
createSphereInVolume(); createSphereInVolume();
for(uint16_t z = 0; z < 8; ++z) for(uint16_t uRegionZ = 0; uRegionZ < g_uVolumeSideLengthInRegions; ++uRegionZ)
{ {
for(uint16_t y = 0; y < 8; ++y) for(uint16_t uRegionY = 0; uRegionY < g_uVolumeSideLengthInRegions; ++uRegionY)
{ {
for(uint16_t x = 0; x < 8; ++x) for(uint16_t uRegionX = 0; uRegionX < g_uVolumeSideLengthInRegions; ++uRegionX)
{ {
g_ispRegionSurfaces[x][y][z] = new IndexedSurfacePatch(false); g_ispRegionSurfaces[uRegionX][uRegionY][uRegionZ] = new IndexedSurfacePatch(false);
generateReferenceMeshDataForRegion(&g_volData, Region(Vector3DInt32(x * 16, y * 16, z * 16), Vector3DInt32((x+1) * 16, (y+1) * 16, (z+1) * 16)), g_ispRegionSurfaces[x][y][z]); IndexedSurfacePatch* ispCurrent = g_ispRegionSurfaces[uRegionX][uRegionY][uRegionZ];
Vector3DInt32 regLowerCorner(uRegionX * g_uRegionSideLength, uRegionY * g_uRegionSideLength, uRegionZ * g_uRegionSideLength);
Vector3DInt32 regUpperCorner((uRegionX + 1) * g_uRegionSideLength, (uRegionY + 1) * g_uRegionSideLength, (uRegionZ + 1) * g_uRegionSideLength);
generateReferenceMeshDataForRegion(&g_volData, Region(regLowerCorner, regUpperCorner), ispCurrent);
} }
} }
} }
@ -152,7 +163,7 @@ void main ( int argc, char** argv ) // Create Main Function For Bringing It Al
init (); init ();
glutInitDisplayMode ( GLUT_RGB | GLUT_DOUBLE ); // Display Mode glutInitDisplayMode ( GLUT_RGB | GLUT_DOUBLE ); // Display Mode
glutInitWindowSize ( 500, 500 ); // If glutFullScreen wasn't called this is the window size glutInitWindowSize ( 500, 500 ); // If glutFullScreen wasn't called this is the window size
glutCreateWindow ( "NeHe's OpenGL Framework" ); // Window Title (argv[0] for current directory as title) glutCreateWindow ( "PolyVox OpenGL Example" ); // Window Title (argv[0] for current directory as title)
//glutFullScreen ( ); // Put Into Full Screen //glutFullScreen ( ); // Put Into Full Screen
glutDisplayFunc ( display ); // Matching Earlier Functions To Their Counterparts glutDisplayFunc ( display ); // Matching Earlier Functions To Their Counterparts
glutReshapeFunc ( reshape ); glutReshapeFunc ( reshape );
@ -160,13 +171,13 @@ void main ( int argc, char** argv ) // Create Main Function For Bringing It Al
glutSpecialFunc ( arrow_keys ); glutSpecialFunc ( arrow_keys );
glutMainLoop ( ); // Initialize The Main Loop glutMainLoop ( ); // Initialize The Main Loop
for(uint16_t z = 0; z < 8; ++z) for(uint16_t uRegionZ = 0; uRegionZ < g_uVolumeSideLengthInRegions; ++uRegionZ)
{ {
for(uint16_t y = 0; y < 8; ++y) for(uint16_t uRegionY = 0; uRegionY < g_uVolumeSideLengthInRegions; ++uRegionY)
{ {
for(uint16_t x = 0; x < 8; ++x) for(uint16_t uRegionX = 0; uRegionX < g_uVolumeSideLengthInRegions; ++uRegionX)
{ {
delete g_ispRegionSurfaces[x][y][z]; delete g_ispRegionSurfaces[uRegionX][uRegionY][uRegionZ];
} }
} }
} }