BGE: Fix T38030: wrong vertex index returned by KX_PolyProxy

Fix T38030.
In c++ source we use one list for triangles and an other for quads, but KX_PolyProxy doesn't care about that and return the vertex offset in its list. So we just have to compute the offset of each RAS_DisplayArray to its previous to have an absolute vertex index.

Reviewers: moguri, campbellbarton, kupoman, agoose77, brita_, hg1

Reviewed By: agoose77, hg1

Projects: #game_engine

Maniphest Tasks: T38030

Differential Revision: https://developer.blender.org/D1324

1 files changed, 10 insertions, 0 deletions

diff --git a/source/gameengine/Rasterizer/RAS_MaterialBucket.cpp b/source/gameengine/Rasterizer/RAS_MaterialBucket.cpp
index 4b5fc6510e0..2078fc99f2e 100644
--- a/source/gameengine/Rasterizer/RAS_MaterialBucket.cpp
+++ b/source/gameengine/Rasterizer/RAS_MaterialBucket.cpp
@@ -287,6 +287,16 @@ void RAS_MeshSlot::AddPolygonVertex(int offset)
 		m_endindex++;
 }
 
+void RAS_MeshSlot::UpdateDisplayArraysOffset()
+{
+	unsigned int offset = 0;
+	for (unsigned short i = 0; i < m_displayArrays.size(); ++i) {
+		RAS_DisplayArray *darray = m_displayArrays[i];
+		darray->m_offset = offset;
+		offset += darray->m_vertex.size();
+	}
+}
+
 void RAS_MeshSlot::SetDeformer(RAS_Deformer* deformer)
 {
 	if (deformer && m_pDeformer != deformer) {