Basic model shading (#9374)

client/shaders/object_shader/opengl_vertex.glsl

@@ -0,0 +1,44 @@
+uniform mat4 mWorldViewProj;
+uniform mat4 mWorld;
+
+uniform vec3 eyePosition;
+uniform float animationTimer;
+
+varying vec3 vNormal;
+varying vec3 vPosition;
+varying vec3 worldPosition;
+
+varying vec3 eyeVec;
+varying vec3 lightVec;
+varying float vIDiff;
+
+const float e = 2.718281828459;
+const float BS = 10.0;
+
+float directional_ambient(vec3 normal)
+{
+	vec3 v = normal * normal;
+
+	if (normal.y < 0)
+		return dot(v, vec3(0.670820f, 0.447213f, 0.836660f));
+
+	return dot(v, vec3(0.670820f, 1.000000f, 0.836660f));
+}
+
+void main(void)
+{
+	gl_TexCoord[0] = gl_MultiTexCoord0;
+	gl_Position = mWorldViewProj * gl_Vertex;
+
+	vPosition = gl_Position.xyz;
+	vNormal = gl_Normal;
+	worldPosition = (mWorld * gl_Vertex).xyz;
+
+	vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
+
+	lightVec = sunPosition - worldPosition;
+	eyeVec = -(gl_ModelViewMatrix * gl_Vertex).xyz;
+	vIDiff = directional_ambient(normalize(gl_Normal));
+
+	gl_FrontColor = gl_BackColor = gl_Color;
+}