Added shaders from i-mic-fps, preload shaders if cyberarm_engine/opengl has been required.

assets/shaders/fragment/lighting.glsl

@@ -0,0 +1,63 @@
+#version 330 core
+out vec4 FragColor;
+
+@include "light_struct"
+const int DIRECTIONAL = 0;
+const int POINT = 1;
+const int SPOT = 2;
+
+in vec2 outTexCoords;
+flat in Light outLight[1];
+
+uniform sampler2D diffuse, position, texcoord, normal, depth;
+
+vec4 directionalLight(Light light) {
+  vec3 norm = normalize(texture(normal, outTexCoords).rgb);
+  vec3 diffuse_color = texture(diffuse, outTexCoords).rgb;
+  vec3 fragPos = texture(position, outTexCoords).rgb;
+
+  vec3 lightDir = normalize(light.position - fragPos);
+  float diff = max(dot(norm, lightDir), 0);
+
+  vec3 _ambient = light.ambient;
+  vec3 _diffuse = light.diffuse * diff;
+  vec3 _specular = light.specular;
+
+  return vec4(_diffuse + _ambient + _specular, 1.0);
+}
+
+vec4 pointLight(Light light) {
+  return vec4(0.25, 0.25, 0.25, 1);
+}
+
+vec4 spotLight(Light light) {
+  return vec4(0.5, 0.5, 0.5, 1);
+}
+
+vec4 calculateLighting(Light light) {
+  vec4 result;
+
+  // switch(light.type) {
+  //   case DIRECTIONAL: {
+  //     result = directionalLight(light);
+  //   }
+  //   case SPOT: {
+  //     result = spotLight(light);
+  //   }
+  //   default: {
+  //     result = pointLight(light);
+  //   }
+  // }
+
+  if (light.type == DIRECTIONAL) {
+    result = directionalLight(light);
+  } else {
+    result = pointLight(light);
+  }
+
+  return result;
+}
+
+void main() {
+  FragColor = texture(diffuse, outTexCoords) * calculateLighting(outLight[0]);
+}