@ -22,35 +22,53 @@ varying vec4 lighting;
varying vec4 passColor;
#endif
varying vec3 passViewPos;
varying vec3 passViewNormal;
varying vec3 passNormal;
#if @parallax
#define PARALLAX_SCALE 0.04
#define PARALLAX_BIAS -0.02
uniform mat4 osg_ViewMatrixInverse;
#endif
#include "lighting.glsl"
void main()
{
vec2 diffuseMapUV = (gl_TextureMatrix[0] * vec4(uv, 0.0, 1.0)).xy;
vec2 adjusted UV = (gl_TextureMatrix[0] * vec4(uv, 0.0, 1.0)).xy;
vec4 diffuseTex = texture2D(diffuseMap, diffuseMapUV);
gl_FragData[0] = vec4(diffuseTex.xyz, 1.0 );
#if @normalMap
vec4 normalTex = texture2D(normalMap, adjustedUV );
#if @blendMap
vec2 blendMapUV = (gl_TextureMatrix[1] * vec4(uv, 0.0, 1.0)).xy;
gl_FragData[0].a *= texture2D(blendMap, blendMapUV).a;
#endif
vec3 normalizedNormal = normalize(passNormal);
vec3 tangent = vec3(1.0, 0.0, 0.0);
vec3 binormal = normalize(cross(tangent, normalizedNormal));
tangent = normalize(cross(normalizedNormal, binormal)); // note, now we need to re-cross to derive tangent again because it wasn't orthonormal
mat3 tbn = mat3(tangent, binormal, normalizedNormal);
vec3 viewNormal = passViewNormal;
vec3 viewNormal = normalize(gl_NormalMatrix * (tbn * (normalTex.xyz * 2.0 - 1.0)));
#else
vec3 viewNormal = normalize(gl_NormalMatrix * passNormal);
#endif
#if @normalMap
vec3 normalTex = texture2D(normalMap, diffuseMapUV).xyz;
#if @parallax
vec3 cameraPos = osg_ViewMatrixInverse[3].xyz;
vec3 eyeDir = normalize(cameraPos - (osg_ViewMatrixInverse * vec4(passViewPos, 1)).xyz);
vec3 TSeyeDir = normalize((vec4(normalize(tbn * eyeDir),0)).xyz);
vec3 viewTangent = (gl_ModelViewMatrix * vec4(1.0, 0.0, 0.0, 0.0)).xyz;
vec3 viewBinormal = normalize(cross(viewTangent, viewNormal));
viewTangent = normalize(cross(viewNormal, viewBinormal)); // note, now we need to re-cross to derive tangent again because it wasn't orthonormal
mat3 tbn = mat3(viewTangent, viewBinormal, viewNormal);
adjustedUV += TSeyeDir.xy * ( normalTex.a * PARALLAX_SCALE + PARALLAX_BIAS );
viewNormal = normalize(tbn * (normalTex * 2.0 - 1.0));
// update normal using new coordinates
normalTex = texture2D(normalMap, adjustedUV);
viewNormal = normalize(gl_NormalMatrix * (tbn * (normalTex.xyz * 2.0 - 1.0)));
#endif
vec4 diffuseTex = texture2D(diffuseMap, adjustedUV);
gl_FragData[0] = vec4(diffuseTex.xyz, 1.0);
#if @blendMap
vec2 blendMapUV = (gl_TextureMatrix[1] * vec4(uv, 0.0, 1.0)).xy;
gl_FragData[0].a *= texture2D(blendMap, blendMapUV).a;
#endif
#if !PER_PIXEL_LIGHTING
gl_FragData[0] *= lighting;
scrawl
9 years ago