增加象素方向光照

shader/DirectionLight.frag

@@ -0,0 +1,46 @@
+#version 450 core
+
+layout(location = 0) in vec3 FragmentNormal;
+layout(location = 0) out vec4 FragColor;
+
+layout(binding=10) uniform WorldMatrix     // hgl/math/Math.h
+{
+    mat4 ortho;
+
+    mat4 projection;
+    mat4 inverse_projection;
+
+    mat4 modelview;
+    mat4 inverse_modelview;
+
+    mat4 mvp;
+    mat4 inverse_mvp;
+
+    vec4 view_pos;
+    vec2 canvas_resolution;
+    vec2 viewport_resolution;
+}fs_world;
+
+layout(binding=1) uniform ColorMaterial
+{
+    vec4 color;
+    vec4 ambient;
+} color_material;
+
+
+layout(binding=2) uniform Sun
+{
+    vec3 direction;
+}sun;
+
+vec4 ComputeSunlightFinalColor()
+{
+    float intensity=max(dot(normalize(FragmentNormal*mat3(fs_world.mvp)),sun.direction),0.0);
+
+    return max(color_material.color*intensity,color_material.ambient);
+}
+
+void main()
+{
+    FragColor=ComputeSunlightFinalColor();
+}