/// <summary>
///
/// </summary>
/// <param name="transformFeedbackObj"></param>
/// <param name="unit"></param>
public static void Draw(this TransformFeedbackObject transformFeedbackObj, RenderUnit unit)
{
if (transformFeedbackObj == null || unit == null)
{
throw new ArgumentNullException();
}
transformFeedbackObj.Draw(unit.Program, unit.VertexArrayObject, unit.StateList);
}
public override void RenderBeforeChildren(RenderEventArgs arg)
{
ICamera camera = arg.CameraStack.Peek();
mat4 projection = camera.GetProjectionMatrix();
mat4 view = camera.GetViewMatrix();
mat4 model = this.GetModelMatrix();
RenderUnit unit = this.RenderUnits[0];
ShaderProgram program = unit.Program;
program.SetUniform("projectionMatrix", projection);
program.SetUniform("viewMatrix", view);
program.SetUniform("modelMatrix", model);
unit.Render();
}
protected override void DoInitialize()
{
base.DoInitialize();
var bmp = new Bitmap(@"KleinBottle.png");
var texture = new Texture(TextureTarget.Texture1D,
new TexImage2D(TexImage2D.Target.Texture2D, 0, GL.GL_RGBA, bmp.Width, bmp.Height, 0, GL.GL_BGRA, GL.GL_UNSIGNED_BYTE, new ImageDataProvider(bmp)));
texture.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_CLAMP_TO_EDGE));
texture.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_CLAMP_TO_EDGE));
texture.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureWrapR, (int)GL.GL_CLAMP_TO_EDGE));
texture.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_LINEAR));
texture.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_LINEAR));
texture.Initialize();
bmp.Dispose();
RenderUnit unit = this.RenderUnits[0];
ShaderProgram program = unit.Program;
program.SetUniform("tex", texture);
}
/// <summary>
///
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public RenderUnit ToRenderUnit(IBufferSource model)
{
// init shader program.
ShaderProgram program = this.programProvider.GetShaderProgram();
// init vertex attribute buffer objects.
VertexShaderAttribute[] vertexAttributeBuffers;
{
var list = new List <VertexShaderAttribute>();
foreach (AttributeMap.NamePair item in this.map)
{
VertexBuffer buffer = model.GetVertexAttributeBuffer(item.NameInIBufferSource);
if (buffer == null)
{
throw new Exception(string.Format("[{0}] returns null buffer pointer!", model));
}
list.Add(new VertexShaderAttribute(buffer, item.VarNameInShader));
}
vertexAttributeBuffers = list.ToArray();
}
// init index buffer.
IndexBuffer indexBuffer = model.GetIndexBuffer();
// init VAO.
var vertexArrayObject = new VertexArrayObject(indexBuffer, program, vertexAttributeBuffers);
var result = new RenderUnit(program, vertexArrayObject, this.states);
// RULE: Renderer takes uint.MaxValue, ushort.MaxValue or byte.MaxValue as PrimitiveRestartIndex. So take care of this rule when designing a model's index buffer.
var ptr = indexBuffer as OneIndexBuffer;
if (ptr != null)
{
GLState glState = new PrimitiveRestartState(ptr.ElementType);
result.StateList.Add(glState);
}
return(result);
}
/// <summary>
///
/// </summary>
protected override void DoInitialize()
{
foreach (var item in this.builders)
{
RenderUnit renderUnit = item.ToRenderUnit(this.model);
this.renderUnits.Add(renderUnit);
}
{
IPickableRenderUnit renderUnit = this.pickingRenderUnitBuilder.ToRenderUnit(this.model);
if (renderUnit.VertexArrayObject.IndexBuffer is ZeroIndexBuffer)
{
this.picker = new ZeroIndexPicker(this);
}
else if (renderUnit.VertexArrayObject.IndexBuffer is OneIndexBuffer)
{
this.picker = new OneIndexPicker(this);
}
this.PickingRenderUnit = renderUnit;
}
}