Fix Pong demo, add notes and TODOs

1 files changed, 11 insertions, 1 deletions

diff --git a/src/llr/llr.c b/src/llr/llr.c
index fe02c0d..25cdf9f 100644
--- a/src/llr/llr.c
+++ b/src/llr/llr.c
@@ -204,7 +204,10 @@ static void configure_state(LLR* renderer) {
   if (renderer->material_changed || renderer->shader_changed) {
     renderer->material_changed = false;
 
-    gfx_material_activate(renderer->shader, renderer->material);
+    // Geometry may be rendered without a material.
+    if (renderer->material) {
+      gfx_material_activate(renderer->shader, renderer->material);
+    }
   }
 
   if (renderer->shader_changed) {
@@ -330,6 +333,13 @@ void gfx_llr_set_camera(LLR* renderer, const Camera* camera) {
   renderer->camera_changed = true;
 }
 
+void gfx_llr_set_projection_matrix(LLR* renderer, const mat4* projection) {
+  assert(renderer);
+
+  renderer->projection     = *projection;
+  renderer->camera_changed = true;
+}
+
 void gfx_llr_set_aspect(LLR* renderer, float aspect) {
   assert(renderer);