protected override void DoInitialize()
{
// init shader program.
ShaderProgram program = this.shaderProgramProvider.GetShaderProgram();
VertexShaderAttribute positionBuffer = null;
IBufferable model = this.DataSource;
{
var list = new List <VertexShaderAttribute>();
foreach (AttributeMap.NamePair item in this.attributeMap)
{
VertexBuffer buffer = model.GetVertexAttributeBuffer(
item.NameInIBufferable, item.VarNameInShader);
if (buffer == null)
{
throw new Exception(string.Format("[{0}] returns null buffer pointer!", model));
}
if (item.NameInIBufferable == this.PositionNameInIBufferable)
{
positionBuffer = new VertexShaderAttribute(buffer, item.VarNameInShader);
//positionBuffer.VarNameInVertexShader = "in_Position";// in_Postion same with in the PickingShader.vert shader
break;
}
}
}
// 由于picking.vert/frag只支持vec3的position buffer，所以有此硬性规定。
if (positionBuffer == null || positionBuffer.Buffer.Config != VBOConfig.Vec3)
{
throw new Exception(string.Format("Position buffer must use a type composed of 3 float as PropertyBuffer<T>'s T!"));
}
// init index buffer.
IndexBuffer indexBuffer = model.GetIndexBuffer();
// RULE: Renderer takes uint.MaxValue, ushort.MaxValue or byte.MaxValue as PrimitiveRestartIndex. So take care this rule when designing a model's index buffer.
var ptr = indexBuffer as OneIndexBuffer;
if (ptr != null)
{
GLState glState = new PrimitiveRestartState(ptr.ElementType);
this.stateList.Add(glState);
}
// init VAO.
var vertexArrayObject = new VertexArrayObject(indexBuffer, positionBuffer);
vertexArrayObject.Initialize(program);
// sets fields.
this.Program = program;
this.vertexShaderAttribute = new VertexShaderAttribute[] { positionBuffer };
this.indexBuffer = indexBuffer;
this.vertexArrayObject = vertexArrayObject;
}
/// <summary>
///
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public IPickableRenderMethod ToRenderMethod(IBufferSource model)
{
// init shader program.
ShaderProgram pickProgram = this.programProvider.GetShaderProgram();
// init vertex attribute buffer objects.
var positionBuffers = new List <VertexBuffer>(); // position attribute is divided into blocks.
// we only care about the position attribute.
foreach (var buffer in model.GetVertexAttributeBuffer(this.positionNameInIBufferSource))
{
if (buffer == null)
{
throw new Exception(string.Format("[{0}] returns null buffer pointer!", model));
}
positionBuffers.Add(buffer);
}
int blockCount = positionBuffers.Count;
// RULE: 由于picking.vert/frag只支持vec3的position buffer，所以有此硬性规定。
foreach (var buffer in positionBuffers)
{
if (buffer == null || buffer.Config != VBOConfig.Vec3)
{
throw new Exception(string.Format("Position buffer must use a type composed of 3 float as PropertyBuffer<T>'s T!"));
}
}
// init draw command.
var allDrawCommands = (from item in model.GetDrawCommand()
where (item != null)
select item).ToArray();
int cmdCount = allDrawCommands.Length;
if (cmdCount != blockCount)
{
throw new Exception("Draw Commands count != vertex buffer block count.");
}
// init VAO.
var pickingVAOs = new VertexArrayObject[cmdCount];
for (int b = 0; b < cmdCount; b++)
{
var vertexAttributeBuffers = new VertexShaderAttribute(positionBuffers[b], PickingShaderHelper.in_Position);
pickingVAOs[b] = new VertexArrayObject(allDrawCommands[b], pickProgram, vertexAttributeBuffers);
}
return(new IPickableRenderMethod(pickProgram, pickingVAOs, positionBuffers.ToArray(), this.switches));
}
/// <summary>
///
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public RenderMethod ToRenderMethod(IBufferSource model)
{
// init shader program.
ShaderProgram program = this.programProvider.GetShaderProgram();
// init vertex attribute buffer objects.
var attrCount = this.map.Count(); // how many kinds of vertex attributes?
var allBlocks = new List <VertexBuffer> [attrCount];
var allNames = new string[attrCount];
int blockCount = 0; // how many blocks an attribute is divided into?
int index = 0;
foreach (AttributeMap.NamePair item in this.map)
{
blockCount = 0;
allBlocks[index] = new List <VertexBuffer>();
foreach (var buffer in model.GetVertexAttributeBuffer(item.NameInIBufferSource))
{
if (buffer == null)
{
throw new Exception(string.Format("[{0}] returns null buffer pointer!", model));
}
allBlocks[index].Add(buffer);
allNames[index] = item.VarNameInShader;
blockCount++;
}
if (blockCount != allBlocks[0].Count)
{
throw new Exception("Not all vertex attribute buffers' block count are the same!");
}
index++;
}
// init draw commands.
var drawCmds = (from item in model.GetDrawCommand()
where (item != null)
select item).ToArray();
int cmdCount = drawCmds.Length;
if (attrCount > 0 && cmdCount != blockCount)
{
throw new Exception("Draw Commands count != vertex buffer block count.");
}
// init VAOs.
var vaos = new VertexArrayObject[cmdCount];
for (int c = 0; c < cmdCount; c++)
{
var vertexShaderAttributes = new VertexShaderAttribute[attrCount];
for (int a = 0; a < attrCount; a++)
{
List <VertexBuffer> vertexAttribute = allBlocks[a];
string varNameInShader = allNames[a];
vertexShaderAttributes[a] = new VertexShaderAttribute(vertexAttribute[c], varNameInShader);
}
vaos[c] = new VertexArrayObject(drawCmds[c], program, vertexShaderAttributes);
}
return(new RenderMethod(program, vaos, this.states));
}
/// <summary>
///
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public IPickableRenderMethod ToRenderMethod(IBufferSource model)
{
// init shader program.
ShaderProgram pickProgram = this.programProvider.GetShaderProgram();
// init vertex attribute buffer objects.
var positionBuffers = new List <VertexBuffer>(); // position attribute is divided into blocks.
// we only care about the position attribute.
foreach (var buffer in model.GetVertexAttributeBuffer(this.positionNameInIBufferSource))
{
if (buffer == null)
{
throw new Exception(string.Format("[{0}] returns null buffer pointer!", model));
}
positionBuffers.Add(buffer);
}
int blockCount = positionBuffers.Count;
// RULE: 由于picking.vert/frag只支持vec3的position buffer，所以有此硬性规定。
foreach (var buffer in positionBuffers)
{
if (buffer == null || buffer.Config != VBOConfig.Vec3)
{
throw new Exception(string.Format("Position buffer must use a type composed of 3 float as PropertyBuffer<T>'s T!"));
}
}
// init draw command.
var allDrawCommands = (from item in model.GetDrawCommand()
where (item != null)
select item).ToArray();
int cmdCount = allDrawCommands.Length;
if (cmdCount != blockCount)
{
throw new Exception("Draw Commands count != vertex buffer block count.");
}
// init VAO.
var pickingVAOs = new VertexArrayObject[cmdCount];
for (int b = 0; b < cmdCount; b++)
{
var vertexAttributeBuffers = new VertexShaderAttribute(positionBuffers[b], PickingShaderHelper.in_Position);
pickingVAOs[b] = new VertexArrayObject(allDrawCommands[b], pickProgram, vertexAttributeBuffers);
}
var renderUnit = new IPickableRenderMethod(pickProgram, pickingVAOs, positionBuffers.ToArray(), this.states);
// RULE: Renderer takes uint.MaxValue, ushort.MaxValue or byte.MaxValue as PrimitiveRestartIndex. So take care this rule when designing a model's index buffer.
foreach (var cmd in allDrawCommands)
{
var ptr = cmd as IHasIndexBuffer;
if (ptr != null)
{
GLState glState = new PrimitiveRestartState(ptr.IndexBufferObject.ElementType);
renderUnit.StateList.Add(glState);
break;
}
}
return(renderUnit);
}
/// <summary>
///
/// </summary>
/// <param name="model"></param>
/// <returns></returns>
public RenderMethod ToRenderMethod(IBufferSource model)
{
// init shader program.
ShaderProgram program = this.programProvider.GetShaderProgram();
// init vertex attribute buffer objects.
var attrCount = this.map.Count(); // how many kinds of vertex attributes?
var allBlocks = new List <VertexBuffer> [attrCount];
var allNames = new string[attrCount];
int blockCount = 0; // how many blocks an attribute is divided into?
int index = 0;
foreach (AttributeMap.NamePair item in this.map)
{
blockCount = 0;
allBlocks[index] = new List <VertexBuffer>();
foreach (var buffer in model.GetVertexAttributeBuffer(item.NameInIBufferSource))
{
if (buffer == null)
{
throw new Exception(string.Format("[{0}] returns null buffer pointer!", model));
}
allBlocks[index].Add(buffer);
allNames[index] = item.VarNameInShader;
blockCount++;
}
if (blockCount != allBlocks[0].Count)
{
throw new Exception("Not all vertex attribute buffers' block count are the same!");
}
index++;
}
// init draw commands.
var drawCmds = (from item in model.GetDrawCommand()
where (item != null)
select item).ToArray();
int cmdCount = drawCmds.Length;
if (attrCount > 0 && cmdCount != blockCount)
{
throw new Exception("Draw Commands count != vertex buffer block count.");
}
// init VAOs.
var vaos = new VertexArrayObject[cmdCount];
for (int c = 0; c < cmdCount; c++)
{
var vertexShaderAttributes = new VertexShaderAttribute[attrCount];
for (int a = 0; a < attrCount; a++)
{
List <VertexBuffer> vertexAttribute = allBlocks[a];
string varNameInShader = allNames[a];
vertexShaderAttributes[a] = new VertexShaderAttribute(vertexAttribute[c], varNameInShader);
}
vaos[c] = new VertexArrayObject(drawCmds[c], program, vertexShaderAttributes);
}
var renderUnit = new RenderMethod(program, vaos, 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.
foreach (var cmd in drawCmds)
{
var ptr = cmd as IHasIndexBuffer;
if (ptr != null)
{
GLState glState = new PrimitiveRestartState(ptr.IndexBufferObject.ElementType);
renderUnit.StateList.Add(glState);
break;
}
}
return(renderUnit);
}