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

assets/shaders/vertex/g_buffer.glsl

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+# version 330 core
+
+layout(location = 0) in vec3 inPosition;
+layout(location = 1) in vec3 inColor;
+layout(location = 2) in vec3 inNormal;
+layout(location = 3) in vec3 inUV;
+
+uniform mat4 projection, view, model;
+uniform int hasTexture;
+uniform vec3 cameraPos;
+
+out vec3 outPosition, outColor, outNormal, outUV;
+out vec3 outFragPos, outViewPos, outCameraPos;
+flat out int outHasTexture;
+
+void main() {
+  // projection * view * model * position
+  outPosition = inPosition;
+  outColor = inColor;
+  outNormal= normalize(transpose(inverse(mat3(model))) * inNormal);
+  outUV    = inUV;
+  outHasTexture = hasTexture;
+  outCameraPos = cameraPos;
+
+  outFragPos = vec3(model * vec4(inPosition, 1.0));
+
+  gl_Position = projection * view * model * vec4(inPosition, 1.0);
+}

assets/shaders/vertex/lighting.glsl

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+#version 330 core
+@include "light_struct"
+
+layout (location = 0) in vec3 inPosition;
+layout (location = 1) in vec2 inTexCoords;
+
+uniform sampler2D diffuse, position, texcoord, normal, depth;
+uniform Light light[1];
+
+out vec2 outTexCoords;
+flat out Light outLight[1];
+
+void main() {
+  gl_Position = vec4(inPosition.x, inPosition.y, inPosition.z, 1.0);
+  outTexCoords = inTexCoords;
+  outLight = light;
+}