/// <summary>
/// Return an array of DisplayMesh objects created from the parameters
/// </summary>
public static Object[] CreateWithMesh(Mesh mesh, ObjectAttributes attr, Material material, int materialIndex)
{
// If our render material is the default material, modify our material to match the Rhino default material
if (materialIndex == -1)
{
material.DiffuseColor = System.Drawing.Color.FromKnownColor(System.Drawing.KnownColor.White);
}
// create vertex normals if missing
if (mesh.Normals.Count == 0)
{
mesh.Normals.ComputeNormals();
}
bool didCreatePartitions = false;
try {
// The minus 3 here is the Paranoid (TM) Constant...
// Since we don't know how well CreatePartition deals with edge cases,
// we give the routine a slightly smaller parameter than the absolutely largest possible
didCreatePartitions = mesh.CreatePartitions(ushort.MaxValue - 3, int.MaxValue - 3);
} catch (Exception ex) {
Rhino.Runtime.HostUtils.ExceptionReport(ex);
}
if (!didCreatePartitions)
{
System.Diagnostics.Debug.WriteLine("Unable to create partitions on mesh {0}", attr.ObjectId.ToString());
//Rhino.Runtime.HostUtils.ExceptionReport (new Exception ("Unable to create partitions on mesh"));
return(null); //invalid mesh, ignore
}
List <DisplayMesh> displayMeshes = new List <DisplayMesh> ();
displayMeshes.Capacity = mesh.PartitionCount;
//System.Diagnostics.Debug.WriteLine("Mesh {0} VertexCount: {1}, FaceCount: {2}, Partition has {3} parts.", attr.ObjectId.ToString(), mesh.Vertices.Count, mesh.Faces.Count, mesh.PartitionCount);
for (int i = 0; i < mesh.PartitionCount; i++)
{
var displayMaterial = new DisplayMaterial(material, materialIndex);
var newMesh = new DisplayMesh(mesh, i, displayMaterial, mesh.PartitionCount > 1, attr.ObjectId);
if (newMesh != null)
{
newMesh.GUID = attr.ObjectId;
newMesh.IsVisible = attr.Visible;
newMesh.LayerIndex = attr.LayerIndex;
displayMeshes.Add(newMesh);
}
}
return(displayMeshes.ToArray());
}
/// <summary>
/// Creates an instance of a DisplayMesh with a new transform.
/// </summary>
public DisplayInstanceMesh(DisplayMesh mesh, Transform xform)
{
Mesh = mesh;
IsVisible = mesh.IsVisible;
LayerIndex = mesh.LayerIndex;
m_xform = xform;
Transform zeroXForm = CreateZeroTransform();
if (m_xform.Equals(zeroXForm))
{
m_xform = Transform.Identity;
}
}
/// <summary>
/// Renders the object in a viewport
/// </summary>
private void RenderObject(DisplayObject obj, Rhino.DocObjects.ViewportInfo viewport, bool isInstance)
{
// If the object is invisible, return.
if (!obj.IsVisible)
{
return;
}
// If the layer that the object is on is turned off, return.
if (!Model.LayerIsVisibleAtIndex(obj.LayerIndex))
{
return;
}
DisplayMesh displayMesh = isInstance ? ((DisplayInstanceMesh)obj).Mesh : (DisplayMesh)obj;
if (displayMesh.WillFitOnGPU == false)
{
return;
}
uint vertex_buffer = 0;
uint index_buffer = 0;
if (displayMesh != null)
{
// Material setup, if necessary...
displayMesh.Material.AmbientColor = new [] { 0.0f, 0.0f, 0.0f, 1.0f }; //We want to ignore the ambient color
if (CurrentMaterial.RuntimeId != displayMesh.Material.RuntimeId)
{
ActiveShader.SetupMaterial(displayMesh.Material);
}
CurrentMaterial = displayMesh.Material;
if (displayMesh.IndexBufferHandle == Globals.UNSET_HANDLE)
{
// Generate the Index VBO
GL.GenBuffers(1, out index_buffer);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, index_buffer);
displayMesh.IndexBufferHandle = index_buffer;
}
if (displayMesh.VertexBufferHandle == Globals.UNSET_HANDLE)
{
// Generate the VertexBuffer
GL.GenBuffers(1, out vertex_buffer);
GL.BindBuffer(BufferTarget.ArrayBuffer, vertex_buffer);
displayMesh.VertexBufferHandle = vertex_buffer;
displayMesh.LoadDataForVBOs(displayMesh.Mesh);
// If CheckGLError turns up an error (likely an OutOfMemory warning because the mesh won't fit on the GPU)
// we need to delete the buffers associated with that displayMesh and mark it as too big.
bool causesGLError = CheckGLError("GL.BufferData");
if (causesGLError)
{
GL.DeleteBuffers(1, ref vertex_buffer);
GL.DeleteBuffers(1, ref index_buffer);
displayMesh.WillFitOnGPU = false;
GC.Collect();
}
else
{
displayMesh.WillFitOnGPU = true;
}
// If we have drawn all the partitions associated with the underlying openNURBS mesh in the ModelFile, we can delete it...
if (displayMesh.Mesh.PartitionCount == displayMesh.PartitionIndex + 1)
{
Model.ModelFile.Objects.Delete(displayMesh.FileObjectId);
}
displayMesh.Mesh = null;
}
if (displayMesh.WillFitOnGPU == false)
{
return;
}
// Vertices
// ORDER MATTERS...if you don't do things in this order, you will get very frusterated.
// First, enable the VertexAttribArray for positions
int rglVertex = ActiveShader.RglVertexIndex;
GL.EnableVertexAttribArray(rglVertex);
// Second, Bind the ArrayBuffer
GL.BindBuffer(BufferTarget.ArrayBuffer, displayMesh.VertexBufferHandle);
// Third, tell GL where to look for the data...
GL.VertexAttribPointer(rglVertex, 3, VertexAttribPointerType.Float, false, displayMesh.Stride, IntPtr.Zero);
CheckGLError("GL.VertexAttribPointer");
// Normals
if (displayMesh.HasVertexNormals)
{
int rglNormal = ActiveShader.RglNormalIndex;
GL.EnableVertexAttribArray(rglNormal);
GL.VertexAttribPointer(rglNormal, 3, VertexAttribPointerType.Float, false, displayMesh.Stride, (IntPtr)(Marshal.SizeOf(typeof(Rhino.Geometry.Point3f))));
CheckGLError("GL.VertexAttribPointer");
}
// Colors
if (displayMesh.HasVertexColors)
{
int rglColor = ActiveShader.RglColorIndex;
GL.EnableVertexAttribArray(rglColor);
GL.VertexAttribPointer(rglColor, 4, VertexAttribPointerType.Float, false, displayMesh.Stride, (IntPtr)(Marshal.SizeOf(typeof(Rhino.Display.Color4f))));
CheckGLError("GL.VertexAttribPointer");
}
if (isInstance)
{
if (!FastDrawing)
{
// Check for inversions on transforms, but only if we are drawing the final "high-quality" frame
// (because our PerPixel shader does not flip normals based on modelView matrices).
if ((obj as DisplayInstanceMesh).XForm.Determinant < -Globals.ON_ZERO_TOLERANCE)
{
// an inversion (happens in mirrored instances, etc.)
// this means the transformation will turn the mesh
// inside out, so we have to reverse our front face
// convention.
GL.FrontFace(FrontFaceDirection.Cw);
}
else
{
GL.FrontFace(FrontFaceDirection.Ccw);
}
}
ActiveShader.SetModelViewMatrix((obj as DisplayInstanceMesh).XForm);
}
// Bind Indices
GL.BindBuffer(BufferTarget.ElementArrayBuffer, displayMesh.IndexBufferHandle);
CheckGLError("GL.BindBuffer");
// Draw...
#if __ANDROID__
GL.DrawElements(All.Triangles, displayMesh.IndexBufferLength, All.UnsignedShort, IntPtr.Zero);
#endif
#if __IOS__
GL.DrawElements(BeginMode.Triangles, displayMesh.IndexBufferLength, DrawElementsType.UnsignedShort, IntPtr.Zero);
#endif
// Disable any and all arrays and buffers we might have used...
GL.BindBuffer(BufferTarget.ArrayBuffer, displayMesh.VertexBufferHandle);
GL.DisableVertexAttribArray(ActiveShader.RglColorIndex);
GL.DisableVertexAttribArray(ActiveShader.RglNormalIndex);
GL.DisableVertexAttribArray(ActiveShader.RglVertexIndex);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, displayMesh.IndexBufferHandle);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
}
}
