Initial CLight integration

Runtime/Graphics/CModelShadersGLSL.cpp

@@ -0,0 +1,51 @@
+#include "CModelShaders.hpp"
+
+namespace urde
+{
+
+static const char* LightingGLSL =
+"struct Light\n"
+"{\n"
+"    vec4 pos;\n"
+"    vec4 dir;\n"
+"    vec4 color;\n"
+"    vec4 linAtt;\n"
+"    vec4 angAtt;\n"
+"};\n"
+"\n"
+"UBINDING2 uniform LightingUniform\n"
+"{\n"
+"    Light lights[" _XSTR(URDE_MAX_LIGHTS) "];\n"
+"    vec4 ambient;\n"
+"};\n"
+"\n"
+"vec4 LightingFunc(vec4 mvPosIn, vec4 mvNormIn)\n"
+"{\n"
+"    vec4 ret = ambient;\n"
+"    \n"
+"    for (int i=0 ; i<" _XSTR(URDE_MAX_LIGHTS) " ; ++i)\n"
+"    {\n"
+"        vec3 delta = mvPosIn.xyz - lights[i].pos.xyz;\n"
+"        float dist = length(delta);\n"
+"        float angDot = dot(normalize(delta), lights[i].dir.xyz);\n"
+"        float att = 1.0 / (lights[i].linAtt[2] * dist * dist +\n"
+"                           lights[i].linAtt[1] * dist +\n"
+"                           lights[i].linAtt[0]);\n"
+"        float angAtt = lights[i].angAtt[2] * angDot * angDot +\n"
+"                       lights[i].angAtt[1] * angDot +\n"
+"                       lights[i].angAtt[0];\n"
+"        ret += lights[i].color * clamp(angAtt, 0.0, 1.0) * att * dot(normalize(-delta), mvNormIn.xyz);\n"
+"    }\n"
+"    \n"
+"    return clamp(ret, vec4(0.0,0.0,0.0,0.0), vec4(1.0,1.0,1.0,1.0));\n"
+"}\n";
+
+hecl::Runtime::ShaderCacheExtensions
+CModelShaders::GetShaderExtensionsGLSL(boo::IGraphicsDataFactory::Platform plat)
+{
+    hecl::Runtime::ShaderCacheExtensions ext(plat);
+    ext.registerExtensionSlot({LightingGLSL, "LightingFunc"}, {});
+    return ext;
+}
+
+}