Rotating multi-textured cube + alpha fix.

src/demo/RuntimeTest/src/cube.cpp

@@ -18,7 +18,9 @@ void Cube::pre_render()  {
         moby->velAngle = moby->lAngle();
         velAngle = rAngle();
     }
-
+    angle.x = angle.x + 18*engine->frameDelta;
+    angle.y = angle.y + 18*engine->frameDelta;
+    angle.z = angle.z + 18*engine->frameDelta;
 }
 
 void Cube::update(float elapsed) {

src/types/entity/entity.cpp

@@ -212,8 +212,22 @@ void Entity::render() {
                 glBindBuffer(GL_ARRAY_BUFFER, getGeometry()->tbo);
                 glTexCoordPointer(2, GL_FLOAT, 0, nullptr);
             }
-            //Mode for every other unit.
-            glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
+
+
+            //Mode for every other unit. We basically "add" each subsequent texture to the previous one like a stack.
+            glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);
+
+            glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_ADD); //RGB
+            glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PREVIOUS);
+            glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_TEXTURE);
+            glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
+            glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR);
+
+            glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_ADD);    //ALPHA
+            glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_PREVIOUS);
+            glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, GL_TEXTURE);
+            glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
+            glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);
             i++;
 
         }

src/types/texture.cpp

@@ -3,7 +3,7 @@
 #include <engine/engine.h>
 
 void Texture::load(const char* file, bool storeOnTextureList) {
-    id = SOIL_load_OGL_texture(file, SOIL_LOAD_RGB, SOIL_CREATE_NEW_ID, SOIL_FLAG_INVERT_Y);
+    id = SOIL_load_OGL_texture(file, SOIL_LOAD_RGBA, SOIL_CREATE_NEW_ID, SOIL_FLAG_INVERT_Y);
     //If we can't load the missing texture
     if (file == "assets/textures/missing.png" && id == 0) {
         engine->setError(ENGINE_ERROR_CODE::TEXTURE_NOT_FOUND, true);