From 9633b155bd46437709ae1cf392845bbdef84ac1e Mon Sep 17 00:00:00 2001
From: Quantum <thomasmuller336@gmail.com>
Date: Sat, 7 Aug 2021 02:02:44 -0400
Subject: [PATCH] Fixed GL math

I did almost every matrix operation backwards...
---
 src/util/render.cpp | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/util/render.cpp b/src/util/render.cpp
index b6f12c2..08c204d 100644
--- a/src/util/render.cpp
+++ b/src/util/render.cpp
@@ -50,10 +50,10 @@ void Render::fill_rectangle_sz(Vector2<int> size, Color color) {
 }
 
 void Render::draw_lines(std::vector<Vector2<float>> points, Color color) {
-    auto prev_cache = m_matrix * m_view_matrix * Vector3<float>(points[0], 1);
+    auto prev_cache = m_view_matrix * m_matrix * Vector3<float>(points[0], 1);
     for(size_t i = 1; i < points.size(); i++) {
         auto start = prev_cache;
-        auto end = m_matrix * m_view_matrix * Vector3<float>(points[i], 1);
+        auto end = m_view_matrix * m_matrix * Vector3<float>(points[i], 1);
 
         m_pge->DrawLine(
             start.x(),
@@ -118,10 +118,10 @@ void Render::pop_matrix() {
 void Render::translate(Vector2<float> trans) {
     switch(m_matrix_mode) {
         case MODEL:
-            m_matrix = translation_matrix(trans) * m_matrix;
+            m_matrix *= translation_matrix(trans);
             break;
         case PROJECTION:
-            m_view_matrix = translation_matrix(trans) * m_view_matrix;
+            m_view_matrix *= translation_matrix(trans);
             break;
     }
 }
@@ -129,10 +129,10 @@ void Render::translate(Vector2<float> trans) {
 void Render::rotate(float theta) {
     switch(m_matrix_mode) {
         case MODEL:
-            m_matrix = rotation_matrix(theta) * m_matrix;
+            m_matrix *= rotation_matrix(theta);
             break;
         case PROJECTION:
-            m_view_matrix = rotation_matrix(theta) * m_view_matrix;
+            m_view_matrix *= rotation_matrix(theta);
             break;
     }
 }
@@ -140,10 +140,10 @@ void Render::rotate(float theta) {
 void Render::scale(Vector2<float> scale) {
     switch(m_matrix_mode) {
         case MODEL:
-            m_matrix = scale_matrix(scale) * m_matrix;
+            m_matrix *= scale_matrix(scale);
             break;
         case PROJECTION:
-            m_view_matrix = scale_matrix(scale) * m_view_matrix;
+            m_view_matrix *= scale_matrix(scale);
     }
 }