81 lines
2.7 KiB
GLSL
81 lines
2.7 KiB
GLSL
// Copyright (C) 2009-2010 Amundis
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// Heavily based on the OpenGL driver implemented by Nikolaus Gebhardt
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// and OpenGL ES driver implemented by Christian Stehno
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// This file is part of the "Irrlicht Engine".
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// For conditions of distribution and use, see copyright notice in Irrlicht.h
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#define MAX_LIGHTS 2
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attribute vec4 inVertexPosition;
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attribute vec4 inVertexColor;
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attribute vec4 inTexCoord0;
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attribute vec3 inVertexNormal;
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attribute vec3 inVertexTangent;
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attribute vec3 inVertexBinormal;
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uniform mat4 uMvpMatrix;
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uniform vec4 uLightPos[MAX_LIGHTS];
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uniform vec4 uLightColor[MAX_LIGHTS];
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uniform vec3 uEyePos;
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varying vec4 varTexCoord;
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varying vec3 varLightVector[MAX_LIGHTS];
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varying vec4 varLightColor[MAX_LIGHTS];
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varying vec3 varEyeVector;
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varying vec4 debug;
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void main(void)
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{
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debug = vec4(inVertexNormal, 1.0);
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// transform position to clip space
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gl_Position = uMvpMatrix * inVertexPosition;
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// vertex - lightpositions
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vec4 tempLightVector0 = uLightPos[0] - inVertexPosition;
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vec4 tempLightVector1 = uLightPos[1] - inVertexPosition;
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// eye vector
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vec4 Temp = vec4(uEyePos, 1.0) - inVertexPosition;
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// transform the light vector 1 with U, V, W
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varLightVector[0].x = dot(inVertexTangent, tempLightVector0.xyz);
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varLightVector[0].y = dot(inVertexBinormal, tempLightVector0.xyz);
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varLightVector[0].z = dot(inVertexNormal, tempLightVector0.xyz);
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// transform the light vector 2 with U, V, W
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varLightVector[1].x = dot(inVertexTangent, tempLightVector1.xyz);
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varLightVector[1].y = dot(inVertexBinormal, tempLightVector1.xyz);
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varLightVector[1].z = dot(inVertexNormal, tempLightVector1.xyz);
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// transform the eye vector with U, V, W
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varEyeVector.x = dot(inVertexTangent, Temp.xyz);
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varEyeVector.y = dot(inVertexBinormal, Temp.xyz);
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varEyeVector.z = dot(inVertexNormal, Temp.xyz);
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varEyeVector *= vec3(1.0,-1.0, -1.0);
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varEyeVector = normalize(varEyeVector);
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// calculate attenuation of light 0
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varLightColor[0].w = 0.0;
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varLightColor[0].x = dot(tempLightVector0, tempLightVector0);
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varLightColor[0].x *= uLightColor[0].w;
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varLightColor[0] = vec4(inversesqrt(varLightColor[0].x));
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varLightColor[0] *= uLightColor[0];
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// normalize light vector 0
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varLightVector[0] = normalize(varLightVector[0]);
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// calculate attenuation of light 1
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varLightColor[1].w = 0.0;
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varLightColor[1].x = dot(tempLightVector1, tempLightVector1);
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varLightColor[1].x *= uLightColor[1].w;
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varLightColor[1] = vec4(inversesqrt(varLightColor[1].x));
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varLightColor[1] *= uLightColor[1];
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// normalize light vector 1
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varLightVector[1] = normalize(varLightVector[1]);
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// move out texture coordinates and original alpha value
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varTexCoord = inTexCoord0;
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varLightColor[0].a = inVertexColor.a;
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} |