def createNorShaders(self, textures, matTextures):
"""
handle normal mapping shader depending on
tangent space calculations.
"""
data = [ShaderData(), ShaderData(), ShaderData()]
norTexData = matTextures.get(Texture2D.MAP_TO_NOR, [])
for (tex, texData) in norTexData:
_, _, _, i = texData
bumpFrag = BumpMapFrag(enabledLights=self.enabledLights)
bumpFrag.setArgs(["texel%d" % i, "n"])
data[FRAG_SHADER].functions.append(bumpFrag)
data[FRAG_SHADER].localVars["texel%d" % i] = \
("vec4", "texture2D( Texture%d, gl_TexCoord[0].xy )" % i)
# need uv coordinate
data[VERT_SHADER].exports["gl_TexCoord[0].xy"] = "vertexUV"
if tex.tangentSpace:
# need to convert some vectors to tangent space
bumpVert = BumpMapVert(enabledLights=self.enabledLights)
bumpVert.setArgs(["n"])
data[VERT_SHADER].functions.append(bumpVert)
data[VERT_SHADER].localVars["n"] = ("vec3", "normalize( gl_NormalMatrix * vertexNormal )")
data[VERT_SHADER].exports[NORMAL_VARYING] = "n"
return data
def createNorShaders(self, textures, matTextures):
"""
create normal mapping aka bump mapping shader.
"""
data = [ShaderData(), ShaderData(), ShaderData()]
norTexData = matTextures.get(Texture2D.MAP_TO_NOR, [])
for (tex, texData) in norTexData:
tex, _, _, i = texData
if tex.tangentSpace: continue
# create eye space normal mapping shader,
# tangent space cannot be calculated by all segments.
bumpFrag = BumpMapFrag(enabledLights=self.enabledLights)
bumpFrag.setArgs(["texel%d" % i, "uv", "n"])
data[FRAG_SHADER].functions.append(bumpFrag)
return data