protected override void DoInitialize()
{
base.DoInitialize();
this.positionBuffer = this.DataSource.GetVertexAttributeBuffer(QuadStripModel.position, null);
this.texCoordBuffer = this.DataSource.GetVertexAttributeBuffer(QuadStripModel.texCoord, null);
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (this.positionBuffer == null)
{
int length = maxCharCount;
VertexBuffer buffer = VertexBuffer.Create(typeof(GlyphPosition), length, VBOConfig.Vec2, varNameInShader, BufferUsage.DynamicDraw);
this.positionBuffer = buffer;
}
return this.positionBuffer;
}
else if (bufferName == strUV)
{
if (this.uvBuffer == null)
{
int length = maxCharCount;
VertexBuffer buffer = VertexBuffer.Create(typeof(GlyphTexCoord), length, VBOConfig.Vec2, varNameInShader, BufferUsage.DynamicDraw);
this.uvBuffer = buffer;
}
return this.uvBuffer;
}
else
{
throw new ArgumentException();
}
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (this.positionBuffer == null)
{
//int length = model.positions.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < model.positions.Length; i++)
// {
// array[i] = model.positions[i];
// }
// buffer.UnmapBuffer();
//}
//this.positionBuffer = buffer;
// another way to do this:
this.positionBuffer = this.model.positions.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.positionBuffer;
}
else if (bufferName == strTexCoord)
{
if (this.uvBuffer == null)
{
//int length = model.texCoords.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec2), length, VBOConfig.Vec2, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec2*)pointer;
// for (int i = 0; i < model.texCoords.Length; i++)
// {
// array[i] = model.texCoords[i];
// }
// buffer.UnmapBuffer();
//}
//this.uvBuffer = buffer;
// another way to do this:
this.uvBuffer = this.model.texCoords.GenVertexBuffer(VBOConfig.Vec2, varNameInShader, BufferUsage.StaticDraw);
}
return this.uvBuffer;
}
else
{
return null;
}
}
/// <summary>
/// 生成顶点属性Buffer。描述顶点的位置或颜色或UV等各种属性。
/// <para>每个<see cref="VertexBuffer"/>仅描述其中一个属性。</para>
/// <para>Vertex Buffer Object that describes vertex' property(position, color, uv coordinate, etc.).</para>
/// <para>Each <see cref="VertexBuffer"/> describes only 1 property.</para>
/// </summary>
/// <param name="array"></param>
/// <param name="config">This <paramref name="config"/> decides parameters' values in glVertexAttribPointer(attributeLocation, size, type, false, 0, IntPtr.Zero);</param>
/// <param name="varNameInVertexShader">此顶点属性VBO对应于vertex shader中的哪个in变量？<para>Mapping variable's name in vertex shader.</para></param>
/// <param name="usage"></param>
/// <param name="instancedDivisor">0: not instanced. 1: instanced divisor is 1.</param>
/// <param name="patchVertexes">How many vertexes makes a patch? No patch if <paramref name="patchVertexes"/> is 0.</param>
/// <returns></returns>
public static VertexBuffer GenVertexBuffer(this UnmanagedArrayBase array, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instancedDivisor = 0, int patchVertexes = 0)
{
if (glGenBuffers == null)
{
InitFunctions();
}
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, array.ByteLength, array.Header, (uint)usage);
glBindBuffer(target, 0);
var buffer = new VertexBuffer(
buffers[0], config, varNameInVertexShader, array.Length, array.ByteLength, instancedDivisor, patchVertexes);
return buffer;
}
/// <summary>
/// Creates a <see cref="VertexBuffer"/> object(actually an array) directly in server side(GPU) without initializing its value.
/// </summary>
/// <param name="elementType">element's type of this 'array'.</param>
/// <param name="length">How many elements are there?</param>
/// <param name="config">mapping to vertex shader's 'in' type.</param>
/// <param name="varNameInVertexShader">mapping to vertex shader's 'in' name.</param>
/// <param name="usage"></param>
/// <param name="instanceDivisor"></param>
/// <param name="patchVertexes"></param>
/// <returns></returns>
public static VertexBuffer Create(Type elementType, int length, VBOConfig config, string varNameInVertexShader, BufferUsage usage, uint instanceDivisor = 0, int patchVertexes = 0)
{
if (!elementType.IsValueType) { throw new ArgumentException(string.Format("{0} must be a value type!", elementType)); }
if (glGenBuffers == null) { glGenBuffers = OpenGL.GetDelegateFor<OpenGL.glGenBuffers>(); }
if (glBindBuffer == null) { glBindBuffer = OpenGL.GetDelegateFor<OpenGL.glBindBuffer>(); }
if (glBufferData == null) { glBufferData = OpenGL.GetDelegateFor<OpenGL.glBufferData>(); }
int byteLength = Marshal.SizeOf(elementType) * length;
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, byteLength, IntPtr.Zero, (uint)usage);
glBindBuffer(target, 0);
var buffer = new VertexBuffer(
buffers[0], config, varNameInVertexShader, length, byteLength, instanceDivisor, patchVertexes);
return buffer;
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public IEnumerable <VertexBuffer> GetVertexAttribute(string bufferName)
{
if (bufferName == strPosition)
{
if (this.positionBuffer == null)
{
//int length = model.positions.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < model.positions.Length; i++)
// {
// array[i] = model.positions[i];
// }
// buffer.UnmapBuffer();
//}
//this.positionBuffer = buffer;
// another way to do this:
this.positionBuffer = this.model.positions.GenVertexBuffer(VBOConfig.Vec3, BufferUsage.StaticDraw);
}
yield return(this.positionBuffer);
}
else if (bufferName == strNormal)
{
if (this.normalBuffer == null)
{
//int length = model.normals.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < model.normals.Length; i++)
// {
// array[i] = model.normals[i];
// }
// buffer.UnmapBuffer();
//}
//this.normalBuffer = buffer;
// another way to do this:
this.normalBuffer = this.model.normals.GenVertexBuffer(VBOConfig.Vec3, BufferUsage.StaticDraw);
}
yield return(this.normalBuffer);
}
else if (bufferName == strColor)
{
if (this.colorBuffer == null)
{
//int length = model.colors.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < model.colors.Length; i++)
// {
// array[i] = model.colors[i];
// }
// buffer.UnmapBuffer();
//}
//this.colorBuffer = buffer;
// another way to do this:
this.colorBuffer = this.model.colors.GenVertexBuffer(VBOConfig.Vec3, BufferUsage.StaticDraw);
}
yield return(this.colorBuffer);
}
else if (bufferName == strUV)
{
if (this.uvBuffer == null)
{
//int length = model.uv.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec2), length, VBOConfig.Vec2, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec2*)pointer;
// for (int i = 0; i < model.uv.Length; i++)
// {
// array[i] = model.uv[i];
// }
// buffer.UnmapBuffer();
//}
//this.uvBuffer = buffer;
// another way to do this:
this.uvBuffer = model.uv.GenVertexBuffer(VBOConfig.Vec2, BufferUsage.StaticDraw);
}
yield return(this.uvBuffer);
}
else
{
throw new ArgumentException();
}
}
/// <summary>
/// start from (0, 0) to the right.
/// </summary>
/// <param name="text"></param>
/// <param name="server"></param>
/// <param name="totalWidth"></param>
/// <param name="totalHeight"></param>
unsafe private void PositionPass(string text, GlyphServer server,
out float totalWidth, out float totalHeight)
{
int textureWidth = server.TextureWidth;
int textureHeight = server.TextureHeight;
VertexBuffer buffer = this.positionBuffer;
var positionArray = (QuadPositionStruct *)buffer.MapBuffer(MapBufferAccess.ReadWrite);
const float height = 2.0f; // let's say height is 2.0f.
totalWidth = 0;
totalHeight = height;
int index = 0;
foreach (var c in text)
{
if (index >= this.labelModel.Capacity)
{
break;
}
GlyphInfo glyphInfo;
float wByH = 0;
if (server.GetGlyphInfo(c, out glyphInfo))
{
float w = (glyphInfo.quad.rightBottom.x - glyphInfo.quad.leftBottom.x) * textureWidth;
float h = (glyphInfo.quad.rightBottom.y - glyphInfo.quad.rightTop.y) * textureHeight;
wByH = height * w / h;
}
else
{
// put an empty glyph(square) here.
wByH = height * 1.0f / 1.0f;
}
var leftTop = new vec2(totalWidth, height / 2);
var leftBottom = new vec2(totalWidth, -height / 2);
var rightBottom = new vec2(totalWidth + wByH, -height / 2);
var rightTop = new vec2(totalWidth + wByH, height / 2);
positionArray[index++] = new QuadPositionStruct(leftTop, leftBottom, rightBottom, rightTop);
totalWidth += wByH;
}
// move to center.
const float scale = 1f;
for (int i = 0; i < text.Length; i++)
{
if (i >= this.labelModel.Capacity)
{
break;
}
QuadPositionStruct quad = positionArray[i];
var newPos = new QuadPositionStruct(
// y is already in [-1, 1], so just shrink x to [-1, 1]
new vec2(quad.leftTop.x / totalWidth * 2.0f - 1f, quad.leftTop.y) * scale,
new vec2(quad.leftBottom.x / totalWidth * 2.0f - 1f, quad.leftBottom.y) * scale,
new vec2(quad.rightBottom.x / totalWidth * 2.0f - 1f, quad.rightBottom.y) * scale,
new vec2(quad.rightTop.x / totalWidth * 2.0f - 1f, quad.rightTop.y) * scale
);
positionArray[i] = newPos;
}
buffer.UnmapBuffer();
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (this.positionBuffer == null)
{
//int length = TetrahedronModel.position.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < TetrahedronModel.position.Length; i++)
// {
// array[i] = TetrahedronModel.position[i];
// }
// buffer.UnmapBuffer();
//}
//this.positionBuffer = buffer;
this.positionBuffer = TetrahedronModel.position.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return(this.positionBuffer);
}
else if (bufferName == strColor)
{
if (this.colorBuffer == null)
{
//int length = TetrahedronModel.color.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < TetrahedronModel.color.Length; i++)
// {
// array[i] = TetrahedronModel.color[i];
// }
// buffer.UnmapBuffer();
//}
//this.colorBuffer = buffer;
this.colorBuffer = TetrahedronModel.color.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return(this.colorBuffer);
}
else if (bufferName == strNormal)
{
if (this.normalBuffer == null)
{
// int length = TetrahedronModel.normal.Length;
// VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
// unsafe
// {
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < TetrahedronModel.normal.Length; i++)
// {
// array[i] = TetrahedronModel.normal[i];
// }
// buffer.UnmapBuffer();
// }
// this.normalBuffer = buffer;
this.normalBuffer = TetrahedronModel.normal.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return(this.normalBuffer);
}
else
{
return(null);
}
}
protected override void DoInitialize()
{
base.DoInitialize();
this.positionBuffer = this.DataSource.GetVertexAttributeBuffer(QuadStripColoredModel.position, null);
this.colorBuffer = this.DataSource.GetVertexAttributeBuffer(QuadStripColoredModel.color, null);
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (this.positionBuffer == null)
{
//int length = TetrahedronModel.position.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < TetrahedronModel.position.Length; i++)
// {
// array[i] = TetrahedronModel.position[i];
// }
// buffer.UnmapBuffer();
//}
//this.positionBuffer = buffer;
this.positionBuffer = TetrahedronModel.position.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.positionBuffer;
}
else if (bufferName == strColor)
{
if (this.colorBuffer == null)
{
//int length = TetrahedronModel.color.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < TetrahedronModel.color.Length; i++)
// {
// array[i] = TetrahedronModel.color[i];
// }
// buffer.UnmapBuffer();
//}
//this.colorBuffer = buffer;
this.colorBuffer = TetrahedronModel.color.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.colorBuffer;
}
else if (bufferName == strNormal)
{
if (this.normalBuffer == null)
{
// int length = TetrahedronModel.normal.Length;
// VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
// unsafe
// {
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer;
// for (int i = 0; i < TetrahedronModel.normal.Length; i++)
// {
// array[i] = TetrahedronModel.normal[i];
// }
// buffer.UnmapBuffer();
// }
// this.normalBuffer = buffer;
this.normalBuffer = TetrahedronModel.normal.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.normalBuffer;
}
else
{
return null;
}
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (this.positionBuffer == null)
{
int length = 1;
VertexBuffer buffer = VertexBuffer.Create(typeof(CubeModel.CubePosition), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.ReadWrite);
{
var array = (CubeModel.CubePosition*)pointer;
array[0] = CubeModel.position;
}
{
var array = (vec3*)pointer;
for (int i = 0; i < 24; i++)
{
array[i] = array[i] / 2 * Lengths;
}
}
buffer.UnmapBuffer();
}
this.positionBuffer = buffer;
}
return this.positionBuffer;
}
else if (bufferName == strColor)
{
if (this.colorBuffer == null)
{
//int length = 1;
//VertexBuffer buffer = VertexBuffer.Create(typeof(CubeModel.CubeColor), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (CubeModel.CubeColor*)pointer;
// array[0] = CubeModel.color;
// buffer.UnmapBuffer();
//}
//this.colorBuffer = buffer;
// another way to do this:
this.colorBuffer = CubeModel.color.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.colorBuffer;
}
else if (bufferName == strNormal)
{
if (this.normalBuffer == null)
{
//int length = 1;
//VertexBuffer buffer = VertexBuffer.Create(typeof(CubeModel.CubeNormal), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (CubeModel.CubeNormal*)pointer;
// array[0] = CubeModel.normal;
// buffer.UnmapBuffer();
//}
//this.normalBuffer = buffer;
// another way to do this:
this.normalBuffer = CubeModel.normal.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.normalBuffer;
}
else
{
return null;
}
}
/// <summary>
/// Get picked geometry from a <see cref="PickableNode"/> with <see cref="DrawArraysCmd"/> as index buffer.
/// </summary>
/// <param name="node"></param>
/// <param name="positionBuffer"></param>
/// <param name="drawCommand"></param>
public DrawArraysPicker(PickableNode node, VertexBuffer positionBuffer, IDrawCommand drawCommand) : base(node, positionBuffer, drawCommand)
{
}
/// <summary>
/// Get picked geometry.
/// </summary>
/// <param name="node"></param>
/// <param name="positionBuffer"></param>
/// <param name="drawCommand"></param>
public PickerBase(PickableNode node, VertexBuffer positionBuffer, IDrawCommand drawCommand)
{
this.Node = node;
this.PositionBuffer = positionBuffer;
this.DrawCommand = drawCommand;
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == position)
{
if (this.positionBuffer == null)
{
int length = this.markerCount * 2;
VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (vec3*)pointer;
for (int i = 0; i < this.markerCount; i++)
{
array[i * 2 + 0] = new vec3(-0.5f + (float)i / (float)(this.markerCount - 1), 0.5f, 0);
array[i * 2 + 1] = new vec3(-0.5f + (float)i / (float)(this.markerCount - 1), -0.5f, 0);
}
buffer.UnmapBuffer();
}
this.positionBuffer = buffer;
}
return this.positionBuffer;
}
else
{
throw new NotImplementedException();
}
}
/// <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 IPickableRenderMethod(ShaderProgram program, VertexArrayObject vao, VertexBuffer positionBuffer, params GLState[] states)
: base(program, vao, states)
{
this.PositionBuffer = positionBuffer;
}
public unsafe VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (positionBuffer != null) { return positionBuffer; }
int length = (faceCount * 2 + 2) * (pipeline.Count - 1);
VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (vec3*)pointer.ToPointer();
int index = 0;
var max = new vec3(float.MinValue, float.MinValue, float.MinValue);
var min = new vec3(float.MaxValue, float.MaxValue, float.MaxValue);
for (int i = 1; i < pipeline.Count; i++)
{
vec3 p1 = pipeline[i - 1];
vec3 p2 = pipeline[i];
vec3 vector = p2 - p1;// 从p1到p2的向量
// 找到互相垂直的三个向量：vector, orthogontalVector1和orthogontalVector2
vec3 orthogontalVector1 = new vec3(vector.y - vector.z, vector.z - vector.x, vector.x - vector.y);
vec3 orthogontalVector2 = vector.cross(orthogontalVector1);
orthogontalVector1 = orthogontalVector1.normalize() * (float)Math.Sqrt(this.radius);
orthogontalVector2 = orthogontalVector2.normalize() * (float)Math.Sqrt(this.radius);
for (int faceIndex = 0; faceIndex < faceCount + 1; faceIndex++)
{
double angle = (Math.PI * 2 * faceIndex) / faceCount;
vec3 delta = orthogontalVector1 * (float)Math.Cos(angle) + orthogontalVector2 * (float)Math.Sin(angle);
vec3 tmp1 = p1 + delta, tmp2 = p2 + delta;
tmp1.UpdateMax(ref max); tmp1.UpdateMin(ref min);
tmp2.UpdateMax(ref max); tmp2.UpdateMin(ref min);
array[index++] = tmp1;
array[index++] = tmp2;
}
}
buffer.UnmapBuffer();
this.ModelSize = max - min;
this.positionBuffer = buffer;
}
return this.positionBuffer;
}
else if (bufferName == strBrightness)
{
if (brightnessBuffer != null) { return brightnessBuffer; }
int length = (faceCount * 2 + 2) * (pipeline.Count - 1);
VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (vec3*)pointer.ToPointer();
var random = new Random();
for (int i = 0; i < buffer.Length; i++)
{
var x = (float)(random.NextDouble() * 0.5 + 0.5);
array[i] = new vec3(x, x, x);
}
buffer.UnmapBuffer();
}
this.brightnessBuffer = buffer;
return this.brightnessBuffer;
}
else
{
throw new ArgumentException();
}
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (this.positionBuffer == null)
{
float[] positions = model.GetPositions();
//int length = positions.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(float), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (float*)pointer;
// for (int i = 0; i < positions.Length; i++)
// {
// array[i] = positions[i];
// }
// buffer.UnmapBuffer();
//}
//this.positionBuffer = buffer;
// another way to do this:
this.positionBuffer = positions.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.positionBuffer;
}
else if (bufferName == strColor)
{
if (this.colorBuffer == null)
{
float[] normals = model.GetNormals();
for (int i = 0; i < normals.Length; i++)
{
if (normals[i] < 0) { normals[i] = -normals[i]; }
}
//int length = normals.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(float), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (float*)pointer;
// for (int i = 0; i < normals.Length; i++)
// {
// array[i] = normals[i];
// }
// buffer.UnmapBuffer();
//}
//this.colorBuffer = buffer;
// another way to do this:
this.colorBuffer = normals.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.colorBuffer;
}
else if (bufferName == strNormal)
{
if (this.normalBuffer == null)
{
float[] normals = model.GetNormals();
//int length = normals.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(float), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (float*)pointer;
// for (int i = 0; i < normals.Length; i++)
// {
// array[i] = normals[i];
// }
// buffer.UnmapBuffer();
//}
//this.normalBuffer = buffer;
// another way to do this:
this.normalBuffer = normals.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.normalBuffer;
}
else
{
return null;
}
}
/// <summary>
/// Get picked geometry from a <see cref="PickableNode"/> with <see cref="DrawArraysCmd"/> as index buffer.
/// </summary>
/// <param name="node"></param>
/// <param name="positionBuffer"></param>
/// <param name="drawCommand"></param>
public DrawElementsPicker(PickableNode node, VertexBuffer positionBuffer, DrawElementsCmd drawCommand)
: base(node, positionBuffer)
{
this.DrawCommand = drawCommand;
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == strPosition)
{
if (this.positionBuffer == null)
{
var array = new vec3[positions.Length];
for (int i = 0; i < positions.Length; i++)
{
array[i] = positions[i] / 2 * this.lengths;
}
VertexBuffer buffer = array.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
this.positionBuffer = buffer;
}
return this.positionBuffer;
}
else
{
throw new ArgumentException();
}
}
/// <summary>
///
/// </summary>
protected override void DoInitialize()
{
// init shader program.
ShaderProgram program = this.renderProgramProvider.GetShaderProgram();
ShaderProgram pickProgram = this.pickProgramProvider.GetShaderProgram();
// init vertex attribute buffer objects.
IBufferable model = this.DataSource;
VertexBuffer positionBuffer = null;
VertexShaderAttribute[] vertexAttributeBuffers;
{
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));
}
list.Add(new VertexShaderAttribute(buffer, item.VarNameInShader));
if (item.VarNameInShader == this.PositionNameInVertexShader)
{
positionBuffer = buffer;
}
}
vertexAttributeBuffers = list.ToArray();
}
// 由于picking.vert/frag只支持vec3的position buffer，所以有此硬性规定。
if (positionBuffer == null || positionBuffer.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);
this.picker = new OneIndexPicker(this);
}
else
{
this.picker = new ZeroIndexPicker(this);
}
// init VAO.
var vertexArrayObject = new VertexArrayObject(indexBuffer, vertexAttributeBuffers);
vertexArrayObject.Initialize(program);
var pickingVAO = new VertexArrayObject(indexBuffer, new VertexShaderAttribute(positionBuffer, "in_Position"));
pickingVAO.Initialize(pickProgram);
// sets fields.
this.RenderProgram = program;
this.PickProgram = pickProgram;
this.vertexShaderAttributes = vertexAttributeBuffers;
this.positionBuffer = positionBuffer;
this.indexBuffer = indexBuffer;
this.vertexArrayObject = vertexArrayObject;
this.pickVertexArrayObject = pickingVAO;
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == position)
{
if (this.positionBuffer == null)
{
//int length = BigDipperModel.positions.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer.ToPointer();
// for (int i = 0; i < BigDipperModel.positions.Length; i++)
// {
// array[i] = BigDipperModel.positions[i];
// }
// buffer.UnmapBuffer();
//}
//this.positionBuffer = buffer;
// another way to do this:
this.positionBuffer = BigDipperModel.positions.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.positionBuffer;
}
else if (bufferName == color)
{
if (this.colorBuffer == null)
{
//int length = BigDipperModel.colors.Length;
//VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
//unsafe
//{
// IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
// var array = (vec3*)pointer.ToPointer();
// for (int i = 0; i < BigDipperModel.colors.Length; i++)
// {
// array[i] = BigDipperModel.colors[i];
// }
// buffer.UnmapBuffer();
//}
//this.colorBuffer = buffer;
// another way to do this:
this.colorBuffer = BigDipperModel.colors.GenVertexBuffer(VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
}
return this.colorBuffer;
}
else
{
throw new NotImplementedException();
}
}
/// <summary>
///
/// </summary>
/// <param name="bufferName"></param>
/// <param name="varNameInShader"></param>
/// <returns></returns>
public VertexBuffer GetVertexAttributeBuffer(string bufferName, string varNameInShader)
{
if (bufferName == position)
{
if (this.positionBuffer == null)
{
int length = (this.quadCount + 1) * 2;
VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (vec3*)pointer;
for (int i = 0; i < (this.quadCount + 1); i++)
{
array[i * 2 + 0] = new vec3(-0.5f + (float)i / (float)(this.quadCount), 0.5f, 0);
array[i * 2 + 1] = new vec3(-0.5f + (float)i / (float)(this.quadCount), -0.5f, 0);
}
buffer.UnmapBuffer();
}
this.positionBuffer = buffer;
}
return positionBuffer;
}
else if (bufferName == color)
{
if (this.colorBuffer == null)
{
int length = (this.quadCount + 1) * 2;
VertexBuffer buffer = VertexBuffer.Create(typeof(vec3), length, VBOConfig.Vec3, varNameInShader, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (vec3*)pointer;
for (int i = 0; i < (this.quadCount + 1); i++)
{
int x = this.bitmap.Width * i / this.quadCount;
if (x == this.bitmap.Width) { x = this.bitmap.Width - 1; }
vec3 value = this.bitmap.GetPixel(x, 0).ToVec3();
array[i * 2 + 0] = value;
array[i * 2 + 1] = value;
}
buffer.UnmapBuffer();
}
this.colorBuffer = buffer;
}
return colorBuffer;
}
else
{
throw new NotImplementedException();
}
}