// Finally, the actual calls to do something with all this data. You can either choose to render
// it given the configuration, or generate a display list of rendering it with the given
// configuration (uses GL_COMPILE mode to build the list). Fails if insufficient data has
// been given (i.e. if you don't give it an array for an enabled parameter, if you don't
// give it an array of indices when it needs them).
// Note that rendering with GLVERTEX_MODE currently involves a lot of CPU overhead to
// unpack the data and pass it to the GL; while the results will be correct, it would be
// unwise to use this method for rendering that is to be benchmarked, because it will
// underestimate performance significantly on some machines.
bool GeomRenderer::renderPrimitives(GLenum mode)
{
if (!isReadyToRender())
{
return false;
}
// Okay, different sections here depending on what we're doing.
if (drawMethod == GLVERTEX_MODE)
{
glBegin(mode);
for (unsigned int x=0; x<indicesCount; x++)
{
int directIndex = getIndex(x);
if (parameterBits & COLOR_BIT) sendColor(directIndex);
if (parameterBits & TEXTURE_COORD_BIT) sendTexCoord(directIndex);
if (parameterBits & NORMAL_BIT) sendNormal(directIndex);
sendVertex(directIndex);
}
glEnd();
}
// Otherwise it has something to do with arrays; set up the arrays.
else
{
if (parameterBits & COLOR_BIT)
{
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(colorData.size, colorData.type, colorData.stride, colorData.pointer);
// std::cout << "Enabled color arrays, size [" << colorData.size << "], type [" << colorData.type
// << "], stride [" << colorData.stride << "], pointer [" << colorData.pointer << "]" << std::endl;
}
if (parameterBits & TEXTURE_COORD_BIT)
{
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(texCoordData.size, texCoordData.type, texCoordData.stride, texCoordData.pointer);
// std::cout << "Enabled texCoord arrays, size [" << texCoordData.size << "], type [" << texCoordData.type
// << "], stride [" << texCoordData.stride << "], pointer [" << texCoordData.pointer << "]" << std::endl;
}
if (parameterBits & NORMAL_BIT)
{
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(normalData.type, normalData.stride, normalData.pointer);
// std::cout << "Enabled normal arrays, size [" << normalData.size << "], type [" << normalData.type
// << "], stride [" << normalData.stride << "], pointer [" << normalData.pointer << "]" << std::endl;
}
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(vertexData.size, vertexData.type, vertexData.stride, vertexData.pointer);
// std::cout << "Enabled vertex arrays, size [" << vertexData.size << "], type [" << vertexData.type
// << "], stride [" << vertexData.stride << "], pointer [" << vertexData.pointer << "]" << std::endl;
// Should we lock?
if (compileArrays)
{
assert(GLUtils::haveExtension("GL_EXT_compiled_vertex_array"));
glLockArraysEXT(0, arrayLength);
}
// Okay, arrays configured; what exactly are we doing?
if (drawMethod == GLARRAYELEMENT_MODE)
{
glBegin(mode);
for (unsigned int x=0; x<indicesCount; x++)
{
glArrayElement(getIndex(x));
}
glEnd();
}
else if (drawMethod == GLDRAWARRAYS_MODE)
{
glDrawArrays(mode, 0, arrayLength);
std::cout << "Called glDrawArrays, mode [" << mode << "], from 0 to " << arrayLength << std::endl;
}
else if (drawMethod == GLDRAWELEMENTS_MODE)
{
glDrawElements(mode, indicesCount, indicesType, indices);
}
// Done. If we locked, unlock.
if (compileArrays)
{
assert(GLUtils::haveExtension("GL_EXT_compiled_vertex_array"));
glUnlockArraysEXT();
}
}
return true;
}
/** Send a 3-component texture coordinate to the rendersystem. */
virtual void sendTexCoord(int texunit, double x, double y, double z)
{ sendTexCoord(texunit, Vector3((float)x, (float)y, (float)z)); }
/** Send a 3-component texture coordinate to the rendersystem. */
virtual void sendTexCoord(int texunit, float x, float y, float z) { sendTexCoord(texunit, Vector3(x, y, z)); }
/** Send a 2-component texture coordinate to the rendersystem. */
virtual void sendTexCoord(int texunit, double x, double y) { sendTexCoord(texunit, Vector2((float)x, (float)y)); }
/** Send a 2-component texture coordinate to the rendersystem. */
virtual void sendTexCoord(int texunit, float x, float y) { sendTexCoord(texunit, Vector2(x, y)); }
/** Send a floating-point texture coordinate to the rendersystem. */
virtual void sendTexCoord(int texunit, double texcoord) { sendTexCoord(texunit, (float)texcoord); }