/// <inheritdoc />
public void RenderInstances(Matrix4 viewMatrix, Matrix4 projectionMatrix, ViewportCamera camera, int count)
{
ThrowIfDisposed();
if (_vertexBuffer is null || _vertexIndexesBuffer is null)
{
return;
}
GL.Disable(EnableCap.CullFace);
GL.Disable(EnableCap.DepthTest);
// Send the vertices to the shader
_vertexBuffer.Bind();
_vertexBuffer.EnableAttributes();
_vertexIndexesBuffer.Bind();
var modelViewProjection = this.ActorTransform.GetModelMatrix() * viewMatrix * projectionMatrix;
_boxShader.Enable();
_boxShader.SetIsInstance(true);
_boxShader.SetMVPMatrix(modelViewProjection);
_boxShader.SetLineColour(this.LineColour);
_boxShader.SetViewMatrix(viewMatrix);
_boxShader.SetProjectionMatrix(projectionMatrix);
// Now draw the box
GL.DrawElementsInstanced
(
PrimitiveType.LineLoop,
24,
DrawElementsType.UnsignedByte,
new IntPtr(0),
count
);
_vertexBuffer.DisableAttributes();
}
private void RenderBoundingBox(ModelGroup modelGroup, Matrix4 modelViewProjection, Color4 colour)
{
BoundingBoxShader boxShader = this.Cache.GetShader(EverlookShader.BoundingBox) as BoundingBoxShader;
if (boxShader == null)
{
throw new ShaderNullException(typeof(BoundingBoxShader));
}
boxShader.Enable();
boxShader.SetMVPMatrix(modelViewProjection);
boxShader.SetLineColour(colour);
GL.Disable(EnableCap.CullFace);
// Render the object
// Send the vertices to the shader
GL.EnableVertexAttribArray(0);
GL.BindBuffer(BufferTarget.ArrayBuffer, this.BoundingBoxVertexBufferLookup[modelGroup]);
GL.VertexAttribPointer
(
0,
3,
VertexAttribPointerType.Float,
false,
0,
0
);
// Bind the index buffer
GL.BindBuffer(BufferTarget.ElementArrayBuffer, this.BoundingBoxVertexIndexBufferID);
// Now draw the box
GL.DrawRangeElements
(
PrimitiveType.LineLoop,
0,
23,
24,
DrawElementsType.UnsignedByte,
new IntPtr(0)
);
GL.DisableVertexAttribArray(0);
}