Added triangle mesh colliders

core/entity.jai

@@ -55,6 +55,7 @@ MAX_CHILDREN :: 16;
         SPHERE;
         BOX;
         CAPSULE;
+        MESH;
     }
 
     Physics_Lock :: enum_flags u8 {

physics/physx.jai

@@ -43,6 +43,8 @@ init_physx :: () {
     tolerance_scale.speed = 10;
     physics = PhysX.PxCreatePhysics(PhysX.PX_PHYSICS_VERSION, foundation, *tolerance_scale, true, pvd, null);
 
+    cooking_params = PhysX.PxCookingParams_new(*tolerance_scale);
+
     dispatcher = PhysX.PxDefaultCpuDispatcherCreate(2);
     material = PhysX.PxPhysics_createMaterial(physics, 0.0, 0.0, 0.6);
 
@@ -201,6 +203,58 @@ create_physx_actor :: (e: *Entity) {
         case .CAPSULE; {
             geo = PhysX.PxCapsuleGeometry_new(e.physics.capsule.radius, e.physics.capsule.half_height-e.physics.capsule.radius);
         }
+        case .MESH; {
+            if e.flags & .RENDERABLE {
+                points : [..] Vector3;
+                points.allocator = temp;
+                indices : [..] u32;
+                indices.allocator = temp;
+
+                model := get_model_by_handle(e.renderable.model);
+
+                for node, node_index: model.nodes {
+                    index_start : u32  = xx indices.count;
+                    render_data := e.renderable.nodes[node_index];
+
+                    success, inv_matrix := inverse(e.transform.model_matrix);
+                    // We need to undo the local to world part of every world matrix
+                    matrix := inv_matrix * render_data.transform.world_matrix;
+
+                    if node.meshes.count > 0 {
+                        for m, mi: node.meshes {
+                            mesh := parray_get(*engine.renderer.meshes, m);
+                            for v: mesh.positions {
+                                array_add(*points, transform_position(v, matrix));
+                            }
+
+                            for i: mesh.indices {
+                                array_add(*indices, index_start + i);
+                            }
+                        }
+                    }
+                }
+                mesh_desc := PhysX.PxTriangleMeshDesc_new();
+                mesh_desc.points.count = xx points.count;
+                mesh_desc.points.stride = size_of(Vector3);
+                mesh_desc.points.data = points.data;
+
+                mesh_desc.triangles.count = cast(u32)(indices.count / 3);
+                mesh_desc.triangles.stride = 3 * size_of(u32);
+                mesh_desc.triangles.data = indices.data;
+
+                if PhysX.PxValidateTriangleMesh(*cooking_params, *mesh_desc) {
+                    assert(false);
+                }
+                
+                stream : PhysX.PxOutputStream;
+                callback := PhysX.PxGetStandaloneInsertionCallback();
+                //read_buffer : PhysX.PxDefaultMemoryInputData_new(;
+                cond : s32;
+                mesh := PhysX.PxCreateTriangleMesh(*cooking_params, *mesh_desc, callback, null);
+                scale := PhysX.PxMeshScale_new(*e.transform.scale);
+                geo = PhysX.PxTriangleMeshGeometry_new(mesh, *scale, 0);
+            }
+        }
     }
 
     shape := PhysX.PxPhysics_createShape(physics, geo, material, false, ifx e.physics.trigger then PHYSX_DEFAULT_TRIGGER_SHAPE_FLAGS else PHYSX_DEFAULT_SIMULATION_SHAPE_FLAGS);
@@ -246,6 +300,7 @@ PhysX :: #import "PhysX";
 #scope_file
 
 physics : *PhysX.PxPhysics;
+cooking_params: PhysX.PxCookingParams;
 material : *PhysX.PxMaterial;
 default_allocator : PhysX.PxAllocatorCallback;
 default_error_callback : PhysX.PxErrorCallback;