# 
# This example demonstrates how to access each shader parameter instantiated 
# on the specified shader and report its shader parameter type
#
from win32com.client import constants as si
app = Application
app.NewScene("", False)
# Set up a dictionary to return nice shader parameter type names
shaderparamtypes = {
        "-1":"siShaderDataTypeUnknown", "0":"siShaderDataTypeBoolean", "1":"siShaderDataTypeInteger",
        "2":"siShaderDataTypeScalar", "3":"siShaderDataTypeVector2", "4":"siShaderDataTypeVector3",
        "5":"siShaderDataTypeVector4", "6":"siShaderDataTypeQuaternion", "7":"siShaderDataTypeMatrix33",
        "8":"siShaderDataTypeMatrix44", "9":"siShaderDataTypeColor3", "10":"siShaderDataTypeColor4",
        "11":"siShaderDataTypeString", "16":"siShaderDataTypeProperty", "17":"siShaderDataTypeProfileCurve",
        "18":"siShaderDataTypeGradient", "32":"siShaderDataTypeReference", "33":"siShaderDataTypeImage",
        "48":"siShaderDataTypeCustom", "64":"siShaderDataTypeStructure", "65":"siShaderDataTypeArray"
}
# Set up a cube with a SimpleSSS shader compound
app.CreatePrim("Cube", "MeshSurface")
sh = app.CreateShaderFromProgID("XSIRTCOMPOUND.SimpleSSS.1.2", "Sources.Materials.DefaultLib.Scene_Material", "")
app.SIConnectShaderToCnxPoint("Sources.Materials.DefaultLib.Scene_Material.SimpleSSS.Surface", 
        "Sources.Materials.DefaultLib.Scene_Material.Phong.ambient", False)
# Now we can see what kind of parameters are instantiated on this shader
for param in sh.Parameters :
        if (param.IsClassOf(si.siShaderParameterID)) :
                app.LogMessage("'" + param.ScriptName + "' == " + shaderparamtypes[str(param.DataType)])
# Expected output:
# INFO : 'bump' == siShaderDataTypeVector3
# INFO : 'ambient' == siShaderDataTypeColor4
# INFO : 'overall_color' == siShaderDataTypeColor4
# INFO : 'diffuse_color' == siShaderDataTypeColor4
# INFO : 'diffuse_weight' == siShaderDataTypeScalar
# INFO : 'front_sss_color' == siShaderDataTypeColor4
# INFO : 'front_sss_weight' == siShaderDataTypeScalar
# INFO : 'front_sss_radius' == siShaderDataTypeScalar
# INFO : 'back_sss_color' == siShaderDataTypeColor4
# INFO : 'back_sss_weight' == siShaderDataTypeScalar
# INFO : 'back_sss_radius' == siShaderDataTypeScalar
# INFO : 'back_sss_depth' == siShaderDataTypeScalar
# INFO : 'specular' == siShaderDataTypeColor4
# INFO : 'exponent' == siShaderDataTypeScalar
# INFO : 'radiance' == siShaderDataTypeColor4
# INFO : 'light' == siShaderDataTypeImage
# INFO : 'screen_composit' == siShaderDataTypeBoolean
# INFO : 'scale_conversion' == siShaderDataTypeScalar
# INFO : 'falloff' == siShaderDataTypeScalar
# INFO : 'samples' == siShaderDataTypeInteger
# INFO : 'lightmap_gamma' == siShaderDataTypeScalar
# INFO : 'scatter_bias' == siShaderDataTypeScalar
# INFO : 'Surface' == siShaderDataTypeColor4
# INFO : 'Lightmap' == siShaderDataTypeCustom