|
private DrawElements ( uint mode, int count, uint type, |
||
| mode | uint | |
| count | int | |
| type | uint | |
| indices | ||
| return | void | |
public override void Render(RenderEventArgs arg, ShaderProgram shaderProgram)
{
IntPtr offset;
switch (this.Type)
{
case IndexElementType.UnsignedByte:
offset = new IntPtr(this.FirstIndex * sizeof(byte));
break;
case IndexElementType.UnsignedShort:
offset = new IntPtr(this.FirstIndex * sizeof(ushort));
break;
case IndexElementType.UnsignedInt:
offset = new IntPtr(this.FirstIndex * sizeof(uint));
break;
default:
throw new NotImplementedException();
}
glBindBuffer(OpenGL.GL_ELEMENT_ARRAY_BUFFER, this.BufferId);
if (arg.RenderMode == RenderModes.ColorCodedPicking &&
arg.PickingGeometryType == GeometryType.Point &&
this.Mode.ToGeometryType() == GeometryType.Line) // picking point from a line
{
// this maybe render points that should not appear.
// so need to select by another picking
OpenGL.DrawElements(DrawMode.Points, this.ElementCount, (uint)this.Type, offset);
}
else
{
OpenGL.DrawElements(this.Mode, this.ElementCount, (uint)this.Type, offset);
}
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
public override void Render(RenderEventArgs arg)
{
int primCount = this.PrimCount;
if (primCount < 1)
{
throw new Exception("error: primCount is less than 1.");
}
uint mode = 0;
IntPtr offset;
if (arg.RenderMode == RenderModes.ColorCodedPicking &&
arg.PickingGeometryType == GeometryType.Point &&
this.Mode.ToGeometryType() == GeometryType.Line) // picking point from a line
{
// this may render points that should not appear.
// so need to select by another picking.
mode = (uint)DrawMode.Points;
}
else
{
mode = (uint)this.Mode;
}
switch (this.Type)
{
case IndexElementType.UByte:
offset = new IntPtr(this.FirstIndex * sizeof(byte));
break;
case IndexElementType.UShort:
offset = new IntPtr(this.FirstIndex * sizeof(ushort));
break;
case IndexElementType.UInt:
offset = new IntPtr(this.FirstIndex * sizeof(uint));
break;
default:
throw new NotImplementedException();
}
glBindBuffer(OpenGL.GL_ELEMENT_ARRAY_BUFFER, this.BufferId);
if (primCount == 1)
{
OpenGL.DrawElements(mode, this.ElementCount, (uint)this.Type, offset);
}
else
{
glDrawElementsInstanced(mode, this.ElementCount, (uint)this.Type, offset, primCount);
}
glBindBuffer(OpenGL.GL_ELEMENT_ARRAY_BUFFER, 0);
}
/// <summary>
///
/// </summary>
public override void Render()
{
int primCount = this.PrimCount;
if (primCount < 1)
{
throw new Exception("error: primCount is less than 1.");
}
uint mode = (uint)this.Mode;
IntPtr offset;
switch (this.ElementType)
{
case IndexBufferElementType.UByte:
offset = new IntPtr(this.FirstIndex * sizeof(byte));
break;
case IndexBufferElementType.UShort:
offset = new IntPtr(this.FirstIndex * sizeof(ushort));
break;
case IndexBufferElementType.UInt:
offset = new IntPtr(this.FirstIndex * sizeof(uint));
break;
default:
throw new NotImplementedException();
}
if (glBindBuffer == null)
{
glBindBuffer = OpenGL.GetDelegateFor <OpenGL.glBindBuffer>();
}
glBindBuffer(OpenGL.GL_ELEMENT_ARRAY_BUFFER, this.BufferId);
if (primCount == 1)
{
OpenGL.DrawElements(mode, this.ElementCount, (uint)this.ElementType, offset);
}
else
{
if (glDrawElementsInstanced == null)
{
glDrawElementsInstanced = OpenGL.GetDelegateFor <OpenGL.glDrawElementsInstanced>();
}
glDrawElementsInstanced(mode, this.ElementCount, (uint)this.ElementType, offset, primCount);
}
glBindBuffer(OpenGL.GL_ELEMENT_ARRAY_BUFFER, 0);
}
