//Attribute map:
//ATTR0 - POSITION0
//ATTR1 - POSITION1
//ATTR2 - NORMAL
//ATTR3 - COLOR0
//ATTR4 - COLOR1
//ATTR5 - FOGCOORD
//ATTR6 -
//ATTR7 -
//ATTR8 - TEXCOORD0
//ATTR9 - TEXCOORD1
//ATTR10 - TEXCOORD2
//ATTR11 - TEXCOORD3
//ATTR12 - TEXCOORD4
//ATTR13 - TEXCOORD5
//ATTR14 - TEXCOORD6
//ATTR15 - TEXCOORD7
bool VertexDataOpenGL::generateStreamInfo()
{
if (!mVertexArray)
glGenVertexArrays(1, &mVertexArray);
glBindVertexArray(mVertexArray);
VertexDeclaration* decl = getDeclaration();
RavAssert(decl);
ushort size = getStreamCount();
for (ushort stream = 0; stream < size; ++stream)
{
//TODO: dynamic_cast
VertexBufferOpenGL* buffer = (VertexBufferOpenGL*)getStream(stream);
RavAssert(buffer);
glBindBuffer(GL_ARRAY_BUFFER, buffer->getBufferID());
//TODO: Check reenabling already enabled states.
unsigned offset = 0;
unsigned stride = decl->getStreamVertexSize(stream);
unsigned streamSize = decl->getElementsCount(stream);
for (unsigned elementID = 0; elementID < streamSize; ++elementID)
{
VertexDeclaration::Element* element = decl->getElement(stream, elementID);
GLint size = 0;
GLenum type = 0;
switch (element->type)
{
case VertexDeclaration::TYPE_BYTE3:
size = 3;
type = GL_BYTE;
break;
case VertexDeclaration::TYPE_BYTE4:
size = 4;
type = GL_BYTE;
break;
case VertexDeclaration::TYPE_REAL1:
size = 1;
type = GL_FLOAT;
break;
case VertexDeclaration::TYPE_REAL2:
size = 2;
type = GL_FLOAT;
break;
case VertexDeclaration::TYPE_REAL3:
size = 3;
type = GL_FLOAT;
break;
case VertexDeclaration::TYPE_REAL4:
size = 4;
type = GL_FLOAT;
break;
}
switch (element->usage)
{
case VertexDeclaration::USAGE_POSITION:
RavAssert(element->usageIndex <= 1);
glEnableVertexAttribArray(element->usageIndex);
glVertexAttribPointer(element->usageIndex, size, type, GL_FALSE, stride, (char*)0 + offset);
break;
case VertexDeclaration::USAGE_NORMAL:
RavAssert(size == 3);
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, size, type, GL_FALSE, stride, (char*)0 + offset);
break;
case VertexDeclaration::USAGE_COLOR:
RavAssert(element->usageIndex <= 1);
glEnableVertexAttribArray(3 + element->usageIndex);
glVertexAttribPointer(3 + element->usageIndex, size, type, GL_FALSE, stride, (char*)0 + offset);
break;
case VertexDeclaration::USAGE_TEXCOORD:
RavAssert(element->usageIndex <= 8);
glEnableVertexAttribArray(8 + element->usageIndex);
glVertexAttribPointer(8 + element->usageIndex, size, type, GL_FALSE, stride, (char*)0 + offset);
break;
}
offset += decl->getTypeSize(element->type);
}
}
glBindVertexArray(0);
return true;
}
