irrlicht/media/Shaders/COGLES2Solid2.vsh

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#define MAX_LIGHTS 8
/* Attributes */
attribute vec3 inVertexPosition;
attribute vec3 inVertexNormal;
attribute vec4 inVertexColor;
attribute vec2 inTexCoord0;
attribute vec2 inTexCoord1;
/* Uniforms */
uniform mat4 uWVPMatrix;
uniform mat4 uWVMatrix;
uniform mat4 uNMatrix;
uniform mat4 uTMatrix0;
uniform mat4 uTMatrix1;
uniform vec4 uGlobalAmbient;
uniform vec4 uMaterialAmbient;
uniform vec4 uMaterialDiffuse;
uniform vec4 uMaterialEmissive;
uniform vec4 uMaterialSpecular;
uniform float uMaterialShininess;
uniform int uLightCount;
uniform int uLightType[MAX_LIGHTS];
uniform vec3 uLightPosition[MAX_LIGHTS];
uniform vec3 uLightDirection[MAX_LIGHTS];
uniform vec3 uLightAttenuation[MAX_LIGHTS];
uniform vec4 uLightAmbient[MAX_LIGHTS];
uniform vec4 uLightDiffuse[MAX_LIGHTS];
uniform vec4 uLightSpecular[MAX_LIGHTS];
uniform float uThickness;
/* Varyings */
varying vec2 vTextureCoord0;
varying vec2 vTextureCoord1;
varying vec4 vVertexColor;
varying vec4 vSpecularColor;
varying float vFogCoord;
void dirLight(in int index, in vec3 position, in vec3 normal, inout vec4 ambient, inout vec4 diffuse, inout vec4 specular)
{
vec3 L = normalize(-(uNMatrix * vec4(uLightDirection[index], 0.0)).xyz);
ambient += uLightAmbient[index];
float NdotL = dot(normal, L);
if (NdotL > 0.0)
{
diffuse += uLightDiffuse[index] * NdotL;
vec3 E = normalize(-position);
vec3 HalfVector = normalize(L + E);
float NdotH = max(0.0, dot(normal, HalfVector));
float SpecularFactor = pow(NdotH, uMaterialShininess);
specular += uLightSpecular[index] * SpecularFactor;
}
}
void pointLight(in int index, in vec3 position, in vec3 normal, inout vec4 ambient, inout vec4 diffuse, inout vec4 specular)
{
vec3 L = uLightPosition[index] - position;
float D = length(L);
L = normalize(L);
float Attenuation = 1.0 / (uLightAttenuation[index].x + uLightAttenuation[index].y * D +
uLightAttenuation[index].z * D * D);
ambient += uLightAmbient[index] * Attenuation;
float NdotL = dot(normal, L);
if (NdotL > 0.0)
{
diffuse += uLightDiffuse[index] * NdotL * Attenuation;
vec3 E = normalize(-position);
vec3 HalfVector = normalize(L + E);
float NdotH = max(0.0, dot(normal, HalfVector));
float SpecularFactor = pow(NdotH, uMaterialShininess);
specular += uLightSpecular[index] * SpecularFactor * Attenuation;
}
}
void spotLight(in int index, in vec3 position, in vec3 normal, inout vec4 ambient, inout vec4 diffuse, inout vec4 specular)
{
// TO-DO
}
void main()
{
gl_Position = uWVPMatrix * vec4(inVertexPosition, 1.0);
gl_PointSize = uThickness;
vec4 TextureCoord0 = vec4(inTexCoord0.x, inTexCoord0.y, 1.0, 1.0);
vTextureCoord0 = vec4(uTMatrix0 * TextureCoord0).xy;
vec4 TextureCoord1 = vec4(inTexCoord1.x, inTexCoord1.y, 1.0, 1.0);
vTextureCoord1 = vec4(uTMatrix1 * TextureCoord1).xy;
vVertexColor = inVertexColor.bgra;
vSpecularColor = vec4(0.0, 0.0, 0.0, 0.0);
vec3 Position = (uWVMatrix * vec4(inVertexPosition, 1.0)).xyz;
if (uLightCount > 0)
{
vec3 Normal = normalize((uNMatrix * vec4(inVertexNormal, 0.0)).xyz);
vec4 Ambient = vec4(0.0, 0.0, 0.0, 0.0);
vec4 Diffuse = vec4(0.0, 0.0, 0.0, 0.0);
for (int i = 0; i < int(MAX_LIGHTS); i++)
{
if( i >= uLightCount ) // can't use uniform as loop-counter directly in glsl
break;
if (uLightType[i] == 0)
pointLight(i, Position, Normal, Ambient, Diffuse, vSpecularColor);
}
for (int i = 0; i < int(MAX_LIGHTS); i++)
{
if( i >= uLightCount )
break;
if (uLightType[i] == 1)
spotLight(i, Position, Normal, Ambient, Diffuse, vSpecularColor);
}
for (int i = 0; i < int(MAX_LIGHTS); i++)
{
if( i >= uLightCount )
break;
if (uLightType[i] == 2)
dirLight(i, Position, Normal, Ambient, Diffuse, vSpecularColor);
}
vec4 LightColor = Ambient * uMaterialAmbient + Diffuse * uMaterialDiffuse;
LightColor = clamp(LightColor, 0.0, 1.0);
LightColor.w = 1.0;
vVertexColor *= LightColor;
vVertexColor += uMaterialEmissive;
vVertexColor += uGlobalAmbient * uMaterialAmbient;
vVertexColor = clamp(vVertexColor, 0.0, 1.0);
vSpecularColor *= uMaterialSpecular;
}
vFogCoord = length(Position);
}