// Gets the alpha of the material
// Checks ogl_use_alpha_transparency to make sure that it's enabled.
internal static bool GetMaterialAlpha(HEU_SessionBase session, HAPI_NodeId nodeID, HAPI_ParmInfo[] parameters, float defaultValue, out float alpha)
{
int foundUseParmId = HEU_ParameterUtility.GetParameterIndexFromNameOrTag(session, nodeID, parameters, HEU_Defines.MAT_OGL_TRANSPARENCY_ATTR_ENABLED);
if (foundUseParmId >= 0)
{
// Found a valid "use" parameter. Check if it is disabled.
int[] useValue = new int[1];
int intValuesIndex = parameters[foundUseParmId].intValuesIndex;
if (session.GetParamIntValues(nodeID, useValue, parameters[foundUseParmId].intValuesIndex, 1))
{
if (useValue.Length > 0 && useValue[0] == 0)
{
// We found the texture, but the use tag is disabled, so don't use it!
alpha = defaultValue;
return false;
}
}
}
if (HEU_ParameterUtility.GetParameterFloatValue(session, nodeID, parameters, HEU_Defines.MAT_OGL_ALPHA_ATTR, defaultValue, out alpha))
{
return true;
}
if (HEU_ParameterUtility.GetParameterFloatValue(session, nodeID, parameters, HEU_Defines.MAT_ALPHA_ATTR, defaultValue, out alpha))
{
return true;
}
if (HEU_ParameterUtility.GetParameterFloatValue(session, nodeID, parameters, HEU_Defines.MAT_OGL_TRANSPARENCY_ATTR, defaultValue, out alpha))
{
alpha = 1 - alpha;
return true;
}
alpha = defaultValue;
return false;
}
/// <summary>
/// For this object's _material, we update the shader attributes and
/// fetch the textures from Houdini.
/// </summary>
/// <param name="materialInfo">This material's info from Houdini</param>
/// <param name="assetCacheFolderPath">Path to asset's cache folder</param>
public bool UpdateMaterialFromHoudini(HAPI_MaterialInfo materialInfo, string assetCacheFolderPath)
{
if (_material == null)
{
return false;
}
HEU_SessionBase session = HEU_SessionManager.GetOrCreateDefaultSession();
HAPI_NodeInfo nodeInfo = new HAPI_NodeInfo();
if (!session.GetNodeInfo(materialInfo.nodeId, ref nodeInfo))
{
return false;
}
// Get all parameters of this material
HAPI_ParmInfo[] parmInfos = new HAPI_ParmInfo[nodeInfo.parmCount];
if (!HEU_GeneralUtility.GetArray1Arg(materialInfo.nodeId, session.GetParams, parmInfos, 0, nodeInfo.parmCount))
{
return false;
}
// Assign transparency shader or non-transparent.
bool isTransparent = IsTransparentMaterial(session, materialInfo.nodeId, parmInfos);
if (isTransparent)
{
_material.shader = HEU_MaterialFactory.FindPluginShader(HEU_PluginSettings.DefaultTransparentShader);
}
else
{
_material.shader = HEU_MaterialFactory.FindPluginShader(HEU_PluginSettings.DefaultStandardShader);
}
if (HEU_PluginSettings.UseLegacyShaders)
{
return UseLegacyShaders(materialInfo, assetCacheFolderPath, session, nodeInfo, parmInfos);
}
// Diffuse texture - render & extract
int diffuseMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_TEX1_ATTR, HEU_Defines.MAT_OGL_TEX1_ATTR_ENABLED);
if (diffuseMapParmIndex < 0)
{
diffuseMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_BASECOLOR_ATTR, HEU_Defines.MAT_BASECOLOR_ATTR_ENABLED);
}
if (diffuseMapParmIndex >= 0 && diffuseMapParmIndex < parmInfos.Length)
{
string diffuseTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[diffuseMapParmIndex]);
_material.mainTexture = HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[diffuseMapParmIndex].id, diffuseTextureFileName, assetCacheFolderPath, false);
}
Color diffuseColor;
if (!HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_DIFF_ATTR, Color.white, out diffuseColor))
{
HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_DIFF_ATTR, Color.white, out diffuseColor);
}
float alpha;
GetMaterialAlpha(session, materialInfo.nodeId, parmInfos, 1f, out alpha);
if (isTransparent)
{
int opacityMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_OPACITY_MAP_ATTR, HEU_Defines.MAT_OGL_OPACITY_MAP_ATTR_ENABLED);
if (opacityMapParmIndex < 0)
{
opacityMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OPACITY_MAP_ATTR, HEU_Defines.MAT_OPACITY_MAP_ATTR_ENABLED);
}
if (opacityMapParmIndex >= 0 && opacityMapParmIndex < parmInfos.Length)
{
string opacityTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[opacityMapParmIndex]);
_material.SetTexture(HEU_Defines.UNITY_SHADER_OPACITY_MAP, HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[opacityMapParmIndex].id, opacityTextureFileName, assetCacheFolderPath, false));
}
}
diffuseColor.a = alpha;
_material.SetColor(HEU_Defines.UNITY_SHADER_COLOR, diffuseColor);
if (HEU_PluginSettings.UseSpecularShader)
{
Color specular;
Color defaultSpecular = new Color(0.2f, 0.2f, 0.2f, 1);
if (!HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_SPEC_ATTR, defaultSpecular, out specular))
{
HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_SPEC_ATTR, defaultSpecular, out specular);
}
_material.SetColor(HEU_Defines.UNITY_SHADER_SPEC_COLOR, specular);
int specMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_SPEC_MAP_ATTR, HEU_Defines.MAT_OGL_SPEC_MAP_ATTR_ENABLED);
if (specMapParmIndex < 0)
{
specMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_SPEC_MAP_ATTR, HEU_Defines.MAT_SPEC_MAP_ATTR_ENABLED);
}
if (specMapParmIndex >= 0 && specMapParmIndex < parmInfos.Length)
{
string specTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[specMapParmIndex]);
_material.SetTexture(HEU_Defines.UNITY_SHADER_SPEC_MAP, HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[specMapParmIndex].id, specTextureFileName, assetCacheFolderPath, false));
}
}
else
{
float metallic = 0;
if (!HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_METALLIC_ATTR, 0f, out metallic))
{
HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_METALLIC_ATTR, 0f, out metallic);
}
_material.SetFloat(HEU_Defines.UNITY_SHADER_METALLIC, metallic);
int metallicMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_METALLIC_MAP_ATTR, HEU_Defines.MAT_OGL_METALLIC_MAP_ATTR_ENABLED);
if (metallicMapParmIndex < 0)
{
metallicMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_METALLIC_MAP_ATTR, HEU_Defines.MAT_METALLIC_MAP_ATTR_ENABLED);
}
if (metallicMapParmIndex >= 0 && metallicMapParmIndex < parmInfos.Length)
{
string metallicTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[metallicMapParmIndex]);
_material.SetTexture(HEU_Defines.UNITY_SHADER_METALLIC_MAP, HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[metallicMapParmIndex].id, metallicTextureFileName, assetCacheFolderPath, false));
}
}
// Normal map - render & extract texture
int normalMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_NORMAL_ATTR, HEU_Defines.MAT_NORMAL_ATTR_ENABLED);
if (normalMapParmIndex < 0)
{
normalMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_NORMAL_ATTR, "");
}
if (normalMapParmIndex >= 0 && normalMapParmIndex < parmInfos.Length)
{
string normalTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[normalMapParmIndex]);
Texture2D normalMap = HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[normalMapParmIndex].id, normalTextureFileName, assetCacheFolderPath, true);
if (normalMap != null)
{
_material.SetTexture(HEU_Defines.UNITY_SHADER_BUMP_MAP, normalMap);
}
}
// Emission
Color emission;
Color defaultEmission = new Color(0, 0, 0, 0);
if (!HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_EMISSIVE_ATTR, defaultEmission, out emission))
{
HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_EMISSIVE_ATTR, defaultEmission, out emission);
}
_material.SetColor(HEU_Defines.UNITY_SHADER_EMISSION_COLOR, emission);
int emissionMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_EMISSIVE_MAP_ATTR, HEU_Defines.MAT_OGL_EMISSIVE_MAP_ATTR_ENABLED);
if (emissionMapParmIndex < 0)
{
emissionMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_EMISSIVE_MAP_ATTR, HEU_Defines.MAT_EMISSIVE_MAP_ATTR_ENABLED);
}
if (emissionMapParmIndex >= 0 && emissionMapParmIndex < parmInfos.Length)
{
string emissionTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[emissionMapParmIndex]);
_material.SetTexture(HEU_Defines.UNITY_SHADER_EMISSION_MAP, HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[emissionMapParmIndex].id, emissionTextureFileName, assetCacheFolderPath, false));
}
// Smoothness (need to invert roughness!)
float roughness;
float defaultRoughness = 0.5f;
if (!HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_ROUGH_ATTR, defaultRoughness, out roughness))
{
HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_ROUGH_ATTR, defaultRoughness, out roughness);
}
// Clamp shininess to non-zero as results in very hard shadows. Unity's UI does not allow zero either.
_material.SetFloat(HEU_Defines.UNITY_SHADER_SMOOTHNESS, Mathf.Max(0.03f, 1.0f - roughness));
int roughMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_ROUGH_MAP_ATTR, HEU_Defines.MAT_OGL_ROUGH_MAP_ATTR_ENABLED);
if (roughMapParmIndex < 0)
{
roughMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_ROUGH_MAP_ATTR, HEU_Defines.MAT_ROUGH_MAP_ATTR_ENABLED);
}
if (roughMapParmIndex >= 0 && roughMapParmIndex < parmInfos.Length)
{
string roughTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[roughMapParmIndex]);
_material.SetTexture(HEU_Defines.UNITY_SHADER_SMOOTHNESS_MAP, HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[roughMapParmIndex].id, roughTextureFileName, assetCacheFolderPath, false, invertTexture: true));
}
// Occlusion (only has ogl map)
int occlusionMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_OCCLUSION_MAP_ATTR, HEU_Defines.MAT_OGL_ROUGH_MAP_ATTR_ENABLED);
if (occlusionMapParmIndex >= 0 && occlusionMapParmIndex < parmInfos.Length)
{
string occlusionTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[occlusionMapParmIndex]);
_material.SetTexture(HEU_Defines.UNITY_SHADER_OCCLUSION_MAP, HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[occlusionMapParmIndex].id, occlusionTextureFileName, assetCacheFolderPath, false));
}
return true;
}
/// <summary>
/// For this object's _material, we update the shader attributes and
/// fetch the textures from Houdini.
/// </summary>
/// <param name="materialInfo">This material's info from Houdini</param>
/// <param name="assetCacheFolderPath">Path to asset's cache folder</param>
public void UpdateMaterialFromHoudini(HAPI_MaterialInfo materialInfo, string assetCacheFolderPath)
{
HEU_SessionBase session = HEU_SessionManager.GetOrCreateDefaultSession();
HAPI_NodeInfo nodeInfo = new HAPI_NodeInfo();
if (!session.GetNodeInfo(materialInfo.nodeId, ref nodeInfo))
{
return;
}
// Get all parameters of this material
HAPI_ParmInfo[] parmInfos = new HAPI_ParmInfo[nodeInfo.parmCount];
if (!HEU_GeneralUtility.GetArray1Arg(materialInfo.nodeId, session.GetParams, parmInfos, 0, nodeInfo.parmCount))
{
return;
}
// Assign transparency shader or non-transparent.
if (IsTransparentMaterial(session, materialInfo.nodeId, parmInfos))
{
_material.shader = HEU_MaterialFactory.FindPluginShader(HEU_PluginSettings.DefaultTransparentShader);
}
else
{
_material.shader = HEU_MaterialFactory.FindPluginShader(HEU_PluginSettings.DefaultStandardShader);
}
// Diffuse texture - render & extract
int diffuseMapParmIndex = HEU_ParameterUtility.GetParameterIndexFromNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_TEX1_ATTR);
if (diffuseMapParmIndex < 0)
{
diffuseMapParmIndex = HEU_ParameterUtility.GetParameterIndexFromNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_BASECOLOR_ATTR);
if (diffuseMapParmIndex < 0)
{
diffuseMapParmIndex = HEU_ParameterUtility.GetParameterIndexFromNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_MAP_ATTR);
}
}
if (diffuseMapParmIndex >= 0 && diffuseMapParmIndex < parmInfos.Length)
{
string diffuseTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[diffuseMapParmIndex]);
_material.mainTexture = HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[diffuseMapParmIndex].id, diffuseTextureFileName, assetCacheFolderPath);
}
// Normal map - render & extract texture
int normalMapParmIndex = HEU_ParameterUtility.GetParameterIndexFromNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_NORMAL_ATTR);
if (normalMapParmIndex >= 0 && normalMapParmIndex < parmInfos.Length)
{
string normalTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[normalMapParmIndex]);
Texture2D normalMap = HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[normalMapParmIndex].id, normalTextureFileName, assetCacheFolderPath);
if (normalMap != null)
{
_material.SetTexture(HEU_Defines.UNITY_SHADER_BUMP_MAP, normalMap);
}
}
// Assign shader properties
// Clamp shininess to non-zero as results in very hard shadows. Unity's UI does not allow zero either.
float shininess = HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_ROUGH_ATTR, 0f);
_material.SetFloat(HEU_Defines.UNITY_SHADER_SHININESS, Mathf.Max(0.03f, 1.0f - shininess));
Color diffuseColor = HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_DIFF_ATTR, Color.white);
diffuseColor.a = HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_ALPHA_ATTR, 1f);
_material.SetColor(HEU_Defines.UNITY_SHADER_COLOR, diffuseColor);
Color specular = HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_SPEC_ATTR, Color.black);
_material.SetColor(HEU_Defines.UNITY_SHADER_SPECCOLOR, specular);
}
private bool UseLegacyShaders(HAPI_MaterialInfo materialInfo, string assetCacheFolderPath, HEU_SessionBase session, HAPI_NodeInfo nodeInfo, HAPI_ParmInfo[] parmInfos)
{
// Diffuse texture - render & extract
int diffuseMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_TEX1_ATTR, HEU_Defines.MAT_OGL_TEX1_ATTR_ENABLED);
if (diffuseMapParmIndex < 0)
{
diffuseMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_BASECOLOR_ATTR, HEU_Defines.MAT_BASECOLOR_ATTR_ENABLED);
if (diffuseMapParmIndex < 0)
{
diffuseMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_MAP_ATTR, "");
}
}
if (diffuseMapParmIndex >= 0 && diffuseMapParmIndex < parmInfos.Length)
{
string diffuseTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[diffuseMapParmIndex]);
_material.mainTexture = HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[diffuseMapParmIndex].id, diffuseTextureFileName, assetCacheFolderPath, false);
}
// Normal map - render & extract texture
int normalMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_NORMAL_ATTR, HEU_Defines.MAT_NORMAL_ATTR_ENABLED);
if (normalMapParmIndex < 0)
{
normalMapParmIndex = HEU_ParameterUtility.FindTextureParamByNameOrTag(session, nodeInfo.id, parmInfos, HEU_Defines.MAT_OGL_NORMAL_ATTR, "");
}
if (normalMapParmIndex >= 0 && normalMapParmIndex < parmInfos.Length)
{
string normalTextureFileName = GetTextureFileNameFromMaterialParam(session, materialInfo.nodeId, parmInfos[normalMapParmIndex]);
Texture2D normalMap = HEU_MaterialFactory.RenderAndExtractImageToTexture(session, materialInfo, parmInfos[normalMapParmIndex].id, normalTextureFileName, assetCacheFolderPath, true);
if (normalMap != null)
{
_material.SetTexture(HEU_Defines.UNITY_SHADER_BUMP_MAP, normalMap);
}
}
// Assign shader properties
// Clamp shininess to non-zero as results in very hard shadows. Unity's UI does not allow zero either.
float shininess;
if (!HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_ROUGH_ATTR, 0f, out shininess))
{
HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_ROUGH_ATTR, 0f, out shininess);
}
_material.SetFloat(HEU_Defines.UNITY_SHADER_SHININESS, Mathf.Max(0.03f, 1.0f - shininess));
Color diffuseColor;
if (!HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_DIFF_ATTR, Color.white, out diffuseColor))
{
HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_DIFF_ATTR, Color.white, out diffuseColor);
}
float alpha;
if (!HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_ALPHA_ATTR, 1f, out alpha))
{
HEU_ParameterUtility.GetParameterFloatValue(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_ALPHA_ATTR, 1f, out alpha);
}
diffuseColor.a = alpha;
_material.SetColor(HEU_Defines.UNITY_SHADER_COLOR, diffuseColor);
Color specular;
if (!HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_OGL_SPEC_ATTR, Color.black, out specular))
{
HEU_ParameterUtility.GetParameterColor3Value(session, materialInfo.nodeId, parmInfos, HEU_Defines.MAT_SPEC_ATTR, Color.black, out specular);
}
_material.SetColor(HEU_Defines.UNITY_SHADER_SPEC_COLOR, specular);
return true;
}
/// <summary>
/// Retruns true if the material (via its parameters) is a transparent material or not.
/// </summary>
/// <param name="session">Current Houdini session</param>
/// <param name="nodeID">The material node ID</param>
/// <param name="parameters">Parameter array containing material info</param>
/// <returns>True if the material is transparent</returns>
public static bool IsTransparentMaterial(HEU_SessionBase session, HAPI_NodeId nodeID, HAPI_ParmInfo[] parameters)
{
float alpha = HEU_ParameterUtility.GetParameterFloatValue(session, nodeID, parameters, HEU_Defines.MAT_OGL_ALPHA_ATTR, 1f);
return alpha < 0.95f;
}
