public override MUserData prepareForDraw(MDagPath objPath, MDagPath cameraPath, MFrameContext frameContext, MUserData oldData)
{
// This function is called by maya internal, .Net SDK has transfered MUserData to the derived one
// Users don't need do the MUserData.getData(oldData) by themselves
FootPrintData data = oldData as FootPrintData;
if (data == null)
{
// Retrieve data cache (create if does not exist)
data = new FootPrintData(false);
data.OwnerShip = false;
}
// compute data and cache it
data.fMultiplier = getMultiplier(objPath);
MColor color = MGeometryUtilities.wireframeColor(objPath);
data.fColor[0] = color.r;
data.fColor[1] = color.g;
data.fColor[2] = color.b;
data.fCustomBoxDraw = mCustomBoxDraw;
data.fCurrentBoundingBox = mCurrentBoundingBox;
// Get the draw override information
data.fDrawOV = objPath.drawOverrideInfo;
return(data);
}
public static void draw(MDrawContext context, MUserData userData)
{
// This function is called by maya internal, .Net SDK has transfered MUserData to the derived one
// Users don't need do the MUserData.getData(oldData) by themselves
FootPrintData footData = MUserData.getData(userData) as FootPrintData;
if (footData == null)
{
return;
}
MDAGDrawOverrideInfo objectOverrideInfo = footData.fDrawOV;
if (objectOverrideInfo.fOverrideEnabled && !objectOverrideInfo.fEnableVisible)
{
return;
}
uint displayStyle = context.getDisplayStyle();
bool drawAsBoundingBox = (displayStyle & (uint)MFrameContext.DisplayStyle.kBoundingBox) != 0 ||
(footData.fDrawOV.fLOD == MDAGDrawOverrideInfo.DrawOverrideLOD.kLODBoundingBox);
if (drawAsBoundingBox && !footData.fCustomBoxDraw)
{
return;
}
// get renderer
Autodesk.Maya.OpenMayaRender.MHWRender.MRenderer theRenderer = Autodesk.Maya.OpenMayaRender.MHWRender.MRenderer.theRenderer();
if (theRenderer == null)
{
return;
}
// get state data
MMatrix transform =
context.getMatrix(MDrawContext.MatrixType.kWorldViewMtx);
MMatrix projection =
context.getMatrix(MDrawContext.MatrixType.kProjectionMtx);
// Check to see if we are drawing in a shadow pass.
// If so then we keep the shading simple which in this
// example means to disable any extra blending state changes
//
MPassContext passCtx = context.passContext;
MStringArray passSem = passCtx.passSemantics;
bool castingShadows = false;
for (int i = 0; i < passSem.length; i++)
{
if (passSem[i] == MPassContext.kShadowPassSemantic)
{
castingShadows = true;
}
}
bool debugPassInformation = false;
if (debugPassInformation)
{
string passId = passCtx.passIdentifier;
MGlobal.displayInfo("footprint node drawing in pass[" + passId + "], semantic[");
for (int i = 0; i < passSem.length; i++)
{
MGlobal.displayInfo(passSem[i]);
}
MGlobal.displayInfo("\n");
}
// get cached data
float multiplier = footData.fMultiplier;
float[] color = new float[4] {
footData.fColor[0],
footData.fColor[1],
footData.fColor[2],
1.0f
};
bool requireBlending = false;
// If we're not casting shadows then do extra work
// for display styles
if (!castingShadows)
{
// Use some monotone version of color to show "default material mode"
//
if ((displayStyle & (uint)MFrameContext.DisplayStyle.kDefaultMaterial) != 0)
{
color[0] = color[1] = color[2] = (color[0] + color[1] + color[2]) / 3.0f;
}
// Do some alpha blending if in x-ray mode
//
else if ((displayStyle & (uint)MFrameContext.DisplayStyle.kXray) != 0)
{
requireBlending = true;
color[3] = 0.3f;
}
}
// Set blend and raster state
//
MStateManager stateMgr = context.stateManager;
MBlendState pOldBlendState = null;
MRasterizerState pOldRasterState = null;
bool rasterStateModified = false;
if ((stateMgr != null) && ((displayStyle & (uint)MFrameContext.DisplayStyle.kGouraudShaded) != 0))
{
// draw filled, and with blending if required
if (requireBlending)
{
if (blendState == null)
{
MBlendStateDesc desc = new MBlendStateDesc();
desc.targetBlends.blendEnable = true;
desc.targetBlends.destinationBlend = MBlendState.BlendOption.kInvSourceAlpha;
desc.targetBlends.alphaDestinationBlend = MBlendState.BlendOption.kInvSourceAlpha;
blendState = MStateManager.acquireBlendState(desc);
}
if (blendState != null)
{
pOldBlendState = stateMgr.blendState;
stateMgr.blendState = blendState;
}
}
// Override culling mode since we always want double-sided
//
pOldRasterState = (stateMgr != null) ? stateMgr.rasterizerState : null;
if (pOldRasterState != null)
{
MRasterizerStateDesc desc = new MRasterizerStateDesc(pOldRasterState.desc);
// It's also possible to change this to kCullFront or kCullBack if we
// wanted to set it to that.
MRasterizerState.CullMode cullMode = MRasterizerState.CullMode.kCullNone;
if (desc.cullMode != cullMode)
{
if (rasterState != null)
{
// Just override the cullmode
desc.cullMode = cullMode;
rasterState = MStateManager.acquireRasterizerState(desc);
}
if (rasterState == null)
{
rasterStateModified = true;
stateMgr.rasterizerState = rasterState;
}
}
}
}
//========================
// Start the draw work
//========================
// Prepare draw agent, default using OpenGL
FootPrintDrawAgentGL drawAgentRef = FootPrintDrawAgentGL.getDrawAgent();
FootPrintDrawAgent drawAgentPtr = drawAgentRef;
if (drawAgentPtr != null)
{
// Set color
drawAgentPtr.setColor(new MColor(color[0], color[1], color[2], color[3]));
// Set matrix
drawAgentPtr.setMatrix(transform, projection);
drawAgentPtr.beginDraw();
if (drawAsBoundingBox)
{
// If it is in bounding bode, draw only bounding box wireframe, nothing else
MPoint min = footData.fCurrentBoundingBox.min;
MPoint max = footData.fCurrentBoundingBox.max;
drawAgentPtr.drawBoundingBox(min, max);
}
else
{
// Templated, only draw wirefame and it is not selectale
bool overideTemplated = objectOverrideInfo.fOverrideEnabled &&
(objectOverrideInfo.fDisplayType == MDAGDrawOverrideInfo.DrawOverrideDisplayType.kDisplayTypeTemplate);
// Override no shaded, only show wireframe
bool overrideNoShaded = objectOverrideInfo.fOverrideEnabled && !objectOverrideInfo.fEnableShading;
if (overideTemplated || overrideNoShaded)
{
drawAgentPtr.drawWireframe(multiplier);
}
else
{
if (((displayStyle & (uint)MFrameContext.DisplayStyle.kGouraudShaded) != 0) ||
((displayStyle & (uint)MFrameContext.DisplayStyle.kTextured)) != 0)
{
drawAgentPtr.drawShaded(multiplier);
}
if ((displayStyle & (uint)MFrameContext.DisplayStyle.kWireFrame) != 0)
{
drawAgentPtr.drawWireframe(multiplier);
}
}
}
drawAgentPtr.endDraw();
}
//========================
// End the draw work
//========================
// Restore old blend state and old raster state
if ((stateMgr != null) && ((displayStyle & (uint)MFrameContext.DisplayStyle.kGouraudShaded) != 0))
{
if ((stateMgr != null) && (pOldBlendState != null))
{
stateMgr.setBlendState(pOldBlendState);
}
if (rasterStateModified && (pOldBlendState != null))
{
stateMgr.setRasterizerState(pOldRasterState);
}
}
}
public override MUserData prepareForDraw(MDagPath objPath, MDagPath cameraPath, MFrameContext frameContext, MUserData oldData)
{
// This function is called by maya internal, .Net SDK has transfered MUserData to the derived one
// Users don't need do the MUserData.getData(oldData) by themselves
FootPrintData data = oldData as FootPrintData;
if (data == null)
{
// Retrieve data cache (create if does not exist)
data = new FootPrintData(false);
data.OwnerShip = false;
}
// compute data and cache it
data.fMultiplier = getMultiplier(objPath);
MColor color = MGeometryUtilities.wireframeColor(objPath);
data.fColor[0] = color.r;
data.fColor[1] = color.g;
data.fColor[2] = color.b;
data.fCustomBoxDraw = mCustomBoxDraw;
data.fCurrentBoundingBox = mCurrentBoundingBox;
// Get the draw override information
data.fDrawOV = objPath.drawOverrideInfo;
return data;
}