Revert "Revert "Shadows""

This reverts commit 73b8bff1f3.

resources/Shaders/ForwardPlus.vert.glsl

@@ -1,8 +1,12 @@
 #version 430
 
+#define MAX_SPLITS 4
+
 uniform mat4 M;
 uniform mat4 V;
 uniform mat4 P;
+uniform mat4 LightV[MAX_SPLITS];
+uniform mat4 LightP[MAX_SPLITS];
 
 layout(location = 0) in vec3 Position;
 layout(location = 1) in vec3 Normal;
@@ -18,6 +22,7 @@ out VertexData{
 	vec2 TextureCoordinate;
 	vec4 ExplosionColor;
 	float ExplosionPercentageElapsed;
+	vec4 PositionLightSpace[MAX_SPLITS];
 }Output;
 
 void main()
@@ -31,4 +36,9 @@ void main()
  	Output.BiTangent = vec3(TIM * vec4(BiTangent, 0.0));
 	Output.ExplosionColor = vec4(1.0);
 	Output.ExplosionPercentageElapsed = 0.0;
+	
+	for(int i = 0; i < MAX_SPLITS; i++)
+	{
+		Output.PositionLightSpace[i] = LightP[i] * LightV[i] * M * vec4(Position, 1.0);
+	}
 }