Full Template for ticket #1

Templates/Full/game/shaders/common/gl/cloudLayerV.glsl

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+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+varying vec4 texCoord12;
+varying vec4 texCoord34;
+varying vec3 vLightTS; // light vector in tangent space, denormalized
+varying vec3 vViewTS;  // view vector in tangent space, denormalized
+varying vec3 vNormalWS; // Normal vector in world space
+varying float worldDist;
+
+//-----------------------------------------------------------------------------
+// Uniforms                                                                        
+//-----------------------------------------------------------------------------
+uniform mat4  modelview;
+uniform vec3  eyePosWorld;
+uniform vec3  sunVec;
+uniform vec2  texOffset0;
+uniform vec2  texOffset1;
+uniform vec2  texOffset2;
+uniform vec3  texScale;
+
+//-----------------------------------------------------------------------------
+// Main                                                                        
+//-----------------------------------------------------------------------------
+void main()
+{   
+   vec4 pos = gl_Vertex;
+   vec3 normal = gl_Normal;
+   vec3 binormal = gl_MultiTexCoord0.xyz;
+   vec3 tangent = gl_MultiTexCoord1.xyz;
+   vec2 uv0 = gl_MultiTexCoord2.st;
+
+   gl_Position = modelview * pos;
+   
+   // Offset the uv so we don't have a seam directly over our head.
+   vec2 uv = uv0 + vec2( 0.5, 0.5 );
+   
+   texCoord12.xy = uv * texScale.x;
+   texCoord12.xy += texOffset0;
+   
+   texCoord12.zw = uv * texScale.y;
+   texCoord12.zw += texOffset1;
+   
+   texCoord34.xy = uv * texScale.z;
+   texCoord34.xy += texOffset2;  
+   
+   texCoord34.z = pos.z;
+   texCoord34.w = 0.0;
+
+   // Transform the normal, tangent and binormal vectors from object space to 
+   // homogeneous projection space:
+   vNormalWS   = -normal; 
+   vec3 vTangentWS  = -tangent;
+   vec3 vBinormalWS = -binormal;
+   
+   // Compute position in world space:
+   vec4 vPositionWS = pos + vec4( eyePosWorld, 1 ); //mul( pos, objTrans );
+
+   // Compute and output the world view vector (unnormalized):
+   vec3 vViewWS = eyePosWorld - vPositionWS.xyz;
+
+   // Compute denormalized light vector in world space:
+   vec3 vLightWS = -sunVec;
+
+   // Normalize the light and view vectors and transform it to the tangent space:
+   mat3 mWorldToTangent = mat3( vTangentWS, vBinormalWS, vNormalWS );
+
+   // Propagate the view and the light vectors (in tangent space):
+   vLightTS = mWorldToTangent * vLightWS;
+   vViewTS  = vViewWS * mWorldToTangent;
+   
+   worldDist = clamp( pow( pos.z, 2.0 ), 0.0, 1.0 );
+}