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!!ARBfp1.0
# bumpd.fp -- David HENRY
# Bump mapping with only Diffuse component
TEMP tmp, normal, diffuse, specular;
PARAM diffuseColor = state.light[0].diffuse;
PARAM ambientColor = state.light[0].ambient;
ATTRIB iTexCoords = fragment.texcoord[0];
ATTRIB iHalfVec = fragment.texcoord[2];
ATTRIB iLightVec = fragment.texcoord[3];
OUTPUT oColor = result.color;
# Fetch normal from normal map, expand to the [-1, 1] range, and normalize
# > vec3 normal = 2.0 * texture2D (normalMap, gl_TexCoord[0].st).rgb - 1.0;
# > normal = normalize (normal);
TEX normal, iTexCoords, texture[2], 2D; # normal = texture2D (normalMap, gl_TexCoord[0].st).rgb
MAD normal, normal, 2.0, -1.0; # normal = 2.0 * normal - 1.0
DP3 normal.w, normal, normal;
RSQ normal.w, normal.w;
MUL normal.xyz, normal.w, normal; # normalize (normal)
# Compute diffuse lighting
# > vec3 diffuse = max (dot (iLightVec, normal), 0.0) * vec3 (gl_LightSource[0].diffuse);
# > diffuse = diffuse * texture2D (decalMap, iTexCoords).rgb;
DP3 tmp, iLightVec, normal; # tmp = dot (iLightVec, normal)
MAX tmp, tmp, 0.0; # tmp = max (dot (iLightVec, normal), 0.0)
MUL diffuse, tmp, diffuseColor; # diffuse = tmp * gl_LightSource[0].diffuse
TEX tmp, iTexCoords, texture[0], 2D; # tmp = texture2D (decalMap, iTexCoords).rgb
MUL diffuse, diffuse, tmp; # diffuse = diffuse * tmp
# Output final color
# > gl_FragColor = vec4 (diffuse, 1.0) + gl_LightSource[0].ambient;
ADD oColor, diffuse, ambientColor; # oColor = diffuse + ambiant
END
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