Fixed immediate mode lighting, improved-ish modern gl lighting

shaders/vertex/default.glsl

@@ -1,4 +1,19 @@
 # version 330 core
+const int MAX_LIGHTS = 4;
+
+struct Light {
+  float end;
+  float type;
+  vec3 position;
+
+  vec3 diffuse;
+  vec3 ambient;
+  vec3 specular;
+
+  vec3 direction;
+
+  float intensity;
+};
 
 layout(location = 0) in vec3  inPosition;
 layout(location = 1) in vec3  inColor;
@@ -12,14 +27,20 @@ out vec4 outNormal;
 out vec3 outUV;
 out float outTextureID;
 out float outHasTexture;
-out vec3 outLightPos;
+out Light outLights[MAX_LIGHTS];
+out float outTotalLights;
 out vec3 outFragPos;
+out vec3 outViewPos;
+out vec3 outCameraPos;
+out vec3 outInverseNormal;
 
 uniform mat4 projection;
 uniform mat4 view;
 uniform mat4 model;
 uniform int hasTexture;
-uniform vec3 lightPos;
+uniform float totalLights;
+uniform Light lights[MAX_LIGHTS];
+uniform vec3 cameraPos;
 
 
 void main() {
@@ -30,7 +51,10 @@ void main() {
   outUV    = inUV;
   outTextureID = inTextureID;
   outHasTexture = hasTexture;
-  outLightPos = lightPos;
+  outLights = lights;
+  outTotalLights = totalLights;
+  outCameraPos = cameraPos;
+  outInverseNormal = mat3(transpose(inverse(model))) * vec3(inNormal);
 
   outFragPos = vec3(model * vec4(inPosition, 1.0));