From 4d0c95c7890570540ddc01c01cbd4d696a0e4e06 Mon Sep 17 00:00:00 2001
From: bjorn <mail@bjornbyt.es>
Date: Thu, 26 Dec 2024 18:23:12 -0800
Subject: [PATCH] Fix newConvexShape with Mesh;

---
 src/modules/graphics/graphics.c | 28 +++++++++++++++-------------
 test/lovr/physics.lua           | 10 ++++++++++
 2 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/src/modules/graphics/graphics.c b/src/modules/graphics/graphics.c
index aec95e4e4..1bc2758f2 100644
--- a/src/modules/graphics/graphics.c
+++ b/src/modules/graphics/graphics.c
@@ -4701,21 +4701,23 @@ bool lovrMeshGetTriangles(Mesh* mesh, float** vertices, uint32_t** indices, uint
     position = (float*) ((char*) position + format->stride);
   }
 
-  if (mesh->indexCount > 0) {
-    *indexCount = mesh->indexCount;
-    *indices = lovrMalloc(*indexCount * sizeof(uint32_t));
-    if (mesh->indexBuffer->info.format->type == TYPE_U16 || mesh->indexBuffer->info.format->type == TYPE_INDEX16) {
-      for (uint32_t i = 0; i < mesh->indexCount; i++) {
-        (*indices)[i] = (uint32_t) ((uint16_t*) mesh->indices)[i];
+  if (indices) {
+    if (mesh->indexCount > 0) {
+      *indexCount = mesh->indexCount;
+      *indices = lovrMalloc(*indexCount * sizeof(uint32_t));
+      if (mesh->indexBuffer->info.format->type == TYPE_U16 || mesh->indexBuffer->info.format->type == TYPE_INDEX16) {
+        for (uint32_t i = 0; i < mesh->indexCount; i++) {
+          (*indices)[i] = (uint32_t) ((uint16_t*) mesh->indices)[i];
+        }
+      } else {
+        memcpy(*indices, mesh->indices, mesh->indexCount * sizeof(uint32_t));
       }
     } else {
-      memcpy(*indices, mesh->indices, mesh->indexCount * sizeof(uint32_t));
-    }
-  } else {
-    *indexCount = format->length;
-    *indices = lovrMalloc(*indexCount * sizeof(uint32_t));
-    for (uint32_t i = 0; i < format->length; i++) {
-      (*indices)[i] = i;
+      *indexCount = format->length;
+      *indices = lovrMalloc(*indexCount * sizeof(uint32_t));
+      for (uint32_t i = 0; i < format->length; i++) {
+        (*indices)[i] = i;
+      }
     }
   }
 
diff --git a/test/lovr/physics.lua b/test/lovr/physics.lua
index aba4e018d..c52f17bff 100644
--- a/test/lovr/physics.lua
+++ b/test/lovr/physics.lua
@@ -87,6 +87,16 @@ group('physics', function()
     test('ConvexShape', function()
       shape = lovr.physics.newConvexShape({ 1, 1, 0, -1, 1, 0, 0, 0, 0, 0, 0, 1 })
       expect(shape:getPointCount()).to.equal(4)
+
+      mesh = lovr.graphics.newMesh({
+        { 1, 1, 0 },
+        { -1, 1, 0 },
+        { 0, 0, 0 },
+        { 0, 0, 1 }
+      })
+      mesh:setIndices({ 1, 2, 3, 1, 3, 4, 1, 2, 4, 2, 3, 4 })
+      shape = lovr.physics.newConvexShape(mesh)
+      expect(shape:getPointCount()).to.equal(4)
     end)
 
     group('MeshShape', function()