void vesMapper::drawPrimitive(const vesRenderState &renderState,
vesSharedPtr<vesPrimitive> primitive)
{
// Send the primitive type information out
renderState.m_material->bindRenderData(
renderState, vesRenderData(primitive->primitiveType(), this->pointSize(), this->lineWidth()));
glDrawElements(primitive->primitiveType(), primitive->numberOfIndices(),
primitive->indicesValueType(), (void*)0);
}
void vesMapper::drawTriangles(const vesRenderState &renderState,
vesSharedPtr<vesPrimitive> triangles)
{
assert(this->m_geometryData);
const unsigned int numberOfIndices
= triangles->numberOfIndices();
unsigned int drawnIndices = 0;
while (drawnIndices < numberOfIndices) {
int numberOfIndicesToDraw = numberOfIndices - drawnIndices;
if (numberOfIndicesToDraw > this->m_maximumTriangleIndicesPerDraw) {
numberOfIndicesToDraw = this->m_maximumTriangleIndicesPerDraw;
}
uintptr_t offset = 0;
// Send the primitive type information out
renderState.m_material->bindRenderData(
renderState, vesRenderData(triangles->primitiveType(), this->pointSize(), this->lineWidth()));
if (!this->m_enableWireframe) {
offset = triangles->sizeOfDataType() * drawnIndices;
glDrawElements(triangles->primitiveType(), numberOfIndicesToDraw,
triangles->indicesValueType(), (void*)offset);
}
else {
for(int i = 0; i < numberOfIndicesToDraw; i += 3)
{
offset = triangles->sizeOfDataType() * i + triangles->sizeOfDataType()
* drawnIndices;
glDrawElements(GL_LINE_LOOP, 3,
triangles->indicesValueType(), (void*)offset);
}
}
drawnIndices += numberOfIndicesToDraw;
}
}
void vesMapper::drawPoints(const vesRenderState &renderState,
vesSharedPtr<vesPrimitive> points)
{
assert(this->m_geometryData);
if(points->size())
{
// Draw using indices
this->drawPrimitive(renderState, points);
}
else
{
vesSharedPtr<vesSourceData> data =
m_geometryData->sourceData(vesVertexAttributeKeys::Position);
// Send the primitive type information out
renderState.m_material->bindRenderData(
renderState, vesRenderData(vesPrimitiveRenderType::Points, this->pointSize(), this->lineWidth()));
glDrawArrays(points->primitiveType(), 0, data->sizeOfArray());
}
}