/// <summary>
///
/// </summary>
/// <param name="program"></param>
/// <param name="vao"></param>
/// <param name="stateList"></param>
public void Draw(ShaderProgram program, VertexArrayObject vao, GLStateList stateList = null)
{
// 绑定shader
program.Bind();
program.PushUniforms(); // push new uniform values to GPU side.
if (stateList != null)
{
stateList.On();
}
DrawMode mode = vao.IndexBuffer.Mode;
this.Bind();
this.Begin(mode);
vao.Bind();
this.Draw(mode);
vao.Unbind();
this.End();
this.Unbind();
if (stateList != null)
{
stateList.Off();
}
// 解绑shader
program.Unbind();
}
/// <summary>
///
/// </summary>
/// <param name="controlMode">index buffer is accessable randomly or only by frame.</param>
/// <param name="transformFeedbackObj"></param>
public void Render(IndexBuffer.ControlMode controlMode = IndexBuffer.ControlMode.ByFrame, TransformFeedbackObject transformFeedbackObj = null)
{
ShaderProgram program = this.Program;
GLStateList stateList = this.StateList;
// 绑定shader
program.Bind();
program.PushUniforms(); // push new uniform values to GPU side.
stateList.On();
if (transformFeedbackObj != null)
{
transformFeedbackObj.Bind();
transformFeedbackObj.Begin(this.VertexArrayObject.IndexBuffer.Mode);
this.VertexArrayObject.Draw(controlMode);
transformFeedbackObj.End();
transformFeedbackObj.Unbind();
}
else
{
this.VertexArrayObject.Draw(controlMode);
}
stateList.Off();
// 解绑shader
program.Unbind();
}
/// <summary>
/// A smallest unit that can render somthing.
/// </summary>
/// <param name="program"></param>
/// <param name="vao"></param>
/// <param name="states"></param>
public RenderMethod(ShaderProgram program, VertexArrayObject vao, params GLState[] states)
{
this.Program = program;
this.VertexArrayObject = vao;
this.StateList = new GLStateList();
this.StateList.AddRange(states);
}
/// <summary>
///
/// </summary>
/// <param name="controlMode">index buffer is accessable randomly or only by frame.</param>
/// <param name="transformFeedbackObj"></param>
public void Render(ControlMode controlMode, TransformFeedbackObject transformFeedbackObj)
{
ShaderProgram program = this.Program;
GLStateList stateList = this.StateList;
// 绑定shader
program.Bind();
program.PushUniforms(); // push new uniform values to GPU side.
stateList.On();
if (transformFeedbackObj != null)
{
transformFeedbackObj.Bind();
foreach (var vao in this.VertexArrayObjects)
{
transformFeedbackObj.Begin(vao.DrawCommand.Mode);
vao.Draw(controlMode);
transformFeedbackObj.End();
}
transformFeedbackObj.Unbind();
}
else
{
foreach (var vao in this.VertexArrayObjects)
{
vao.Draw(controlMode);
}
}
stateList.Off();
// 解绑shader
program.Unbind();
}
/// <summary>
///
/// </summary>
/// <param name="program"></param>
/// <param name="vaos"></param>
/// <param name="stateList"></param>
public void Draw(ShaderProgram program, VertexArrayObject[] vaos, GLStateList stateList = null)
{
// 绑定shader
program.Bind();
program.PushUniforms(); // push new uniform values to GPU side.
if (stateList != null)
{
stateList.On();
}
this.Bind();
foreach (var vao in vaos)
{
DrawMode mode = vao.DrawCommand.Mode;
this.Begin(mode);
vao.Bind();
this.Draw(mode);
vao.Unbind();
this.End();
}
this.Unbind();
if (stateList != null)
{
stateList.Off();
}
// 解绑shader
program.Unbind();
}
/// <summary>
/// A smallest unit that can render somthing.
/// </summary>
/// <param name="program"></param>
/// <param name="vao"></param>
/// <param name="positionBuffer"></param>
/// <param name="states"></param>
public IPickableRenderUnit(ShaderProgram program, VertexArrayObject vao, VertexBuffer positionBuffer, params GLState[] states)
{
this.Program = program;
this.VertexArrayObject = vao;
this.PositionBuffer = positionBuffer;
this.StateList = new GLStateList();
this.StateList.AddRange(states);
}
