/// <summary>
/// Generate the texture.
/// </summary>
public void GenerateTexture()
{
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
texName = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, texName);
Vector3[] data = new Vector3[TEX_SIZE * TEX_SIZE];
for (int y = 0; y < TEX_SIZE; y++)
{
for (int x = 0; x < TEX_SIZE; x++)
{
int i = y * TEX_SIZE + x;
bool odd = ((x / TEX_CHECKER_SIZE + y / TEX_CHECKER_SIZE) & 1) > 0;
data[i] = odd ? colBlack : colWhite;
// add some fancy shading on the edges:
if ((x % TEX_CHECKER_SIZE) == 0 || (y % TEX_CHECKER_SIZE) == 0)
{
data[i] += colShade;
}
if (((x + 1) % TEX_CHECKER_SIZE) == 0 || ((y + 1) % TEX_CHECKER_SIZE) == 0)
{
data[i] -= colShade;
}
}
}
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgb, TEX_SIZE, TEX_SIZE, 0, PixelFormat.Rgb, PixelType.Float, data);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMagFilter.Linear);
GlInfo.LogError("create-texture");
}
/// <summary>
/// Resize the texture object.
/// </summary>
void ResizeTexture(int width, int height)
{
// check the texture name:
if (texName == 0)
{
texName = GL.GenTexture();
texWidth = 0;
}
if (texWidth == width &&
texHeight == height)
{
return;
}
texWidth = width;
texHeight = height;
GL.BindTexture(TextureTarget.Texture2D, texName);
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
GL.PixelStore(PixelStoreParameter.PackAlignment, 1);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba8, texWidth, texHeight, 0, PixelFormat.Rgba, PixelType.UnsignedByte, (IntPtr)0);
Debug.Assert(GL.GetError() == ErrorCode.NoError, "glTexImage2D");
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.ClampToEdge);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.ClampToEdge);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMagFilter.Nearest);
GlInfo.LogError("resize-texture");
PrepareClBuffers();
}
/// <summary>
/// Generate static procedural texture.
/// </summary>
/// <returns>Texture handle or 0 if no texture will be used.</returns>
int GenerateTexture()
{
// !!! TODO: change this part if you want, return 0 if texture is not used.
// Generated (procedural) texture.
const int TEX_SIZE = 128;
const int TEX_CHECKER_SIZE = 8;
Vector3 colWhite = new Vector3(0.85f, 0.75f, 0.30f);
Vector3 colBlack = new Vector3(0.15f, 0.15f, 0.60f);
Vector3 colShade = new Vector3(0.15f, 0.15f, 0.15f);
GL.PixelStore(PixelStoreParameter.UnpackAlignment, 1);
int texName = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, texName);
Vector3[] data = new Vector3[TEX_SIZE * TEX_SIZE];
for (int y = 0; y < TEX_SIZE; y++)
{
for (int x = 0; x < TEX_SIZE; x++)
{
int i = y * TEX_SIZE + x;
bool odd = ((x / TEX_CHECKER_SIZE + y / TEX_CHECKER_SIZE) & 1) > 0;
data[i] = odd ? colBlack : colWhite;
// Add some fancy shading on the edges.
if ((x % TEX_CHECKER_SIZE) == 0 || (y % TEX_CHECKER_SIZE) == 0)
{
data[i] += colShade;
}
if (((x + 1) % TEX_CHECKER_SIZE) == 0 || ((y + 1) % TEX_CHECKER_SIZE) == 0)
{
data[i] -= colShade;
}
// Add top-half texture markers.
if (y < TEX_SIZE / 2)
{
if (x % TEX_CHECKER_SIZE == TEX_CHECKER_SIZE / 2 &&
y % TEX_CHECKER_SIZE == TEX_CHECKER_SIZE / 2)
{
data[i] -= colShade;
}
}
}
}
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgb, TEX_SIZE, TEX_SIZE, 0, PixelFormat.Rgb, PixelType.Float, data);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)TextureWrapMode.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)TextureWrapMode.Repeat);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMagFilter.Linear);
GlInfo.LogError("create-texture");
return(texName);
}
void RenderInit(OpenglState OGL)
{
// Scene rendering from VBOs.
OGL.SetVertexAttrib(true);
// Using GLSL shaders.
GL.UseProgram(OGL.activeProgram.Id);
// Uniforms.
// Camera, projection, ..
Matrix4 modelView = OGL.GetModelView();
Matrix4 modelViewInv = OGL.GetModelViewInv();
Matrix4 projection = OGL.GetProjection();
Vector3 eye = OGL.GetEyePosition();
// Give matrices to shaders.
GL.UniformMatrix4(OGL.activeProgram.GetUniform("matrixModelView"), false, ref modelView);
GL.UniformMatrix4(OGL.activeProgram.GetUniform("matrixProjection"), false, ref projection);
// Lighting constants.
GL.Uniform3(OGL.activeProgram.GetUniform("globalAmbient"), ref OGL.globalAmbient);
GL.Uniform3(OGL.activeProgram.GetUniform("lightColor"), ref OGL.whiteLight);
GL.Uniform3(OGL.activeProgram.GetUniform("lightPosition"), ref OGL.lightPosition);
GL.Uniform3(OGL.activeProgram.GetUniform("eyePosition"), ref eye);
GL.Uniform3(OGL.activeProgram.GetUniform("Ka"), ref OGL.matAmbient);
GL.Uniform3(OGL.activeProgram.GetUniform("Kd"), ref OGL.matDiffuse);
GL.Uniform3(OGL.activeProgram.GetUniform("Ks"), ref OGL.matSpecular);
GL.Uniform1(OGL.activeProgram.GetUniform("shininess"), OGL.matShininess);
// Global color handling.
bool useColors = !OGL.useGlobalColor;
GL.Uniform1(OGL.activeProgram.GetUniform("globalColor"), useColors ? 0 : 1);
// Use varying normals?
bool useNormals = OGL.useNormals;
GL.Uniform1(OGL.activeProgram.GetUniform("useNormal"), useNormals ? 1 : 0);
GlInfo.LogError("set-uniforms");
// Texture handling.
bool useTexture = OGL.useTexture;
GL.Uniform1(OGL.activeProgram.GetUniform("useTexture"), useTexture ? 1 : 0);
GL.Uniform1(OGL.activeProgram.GetUniform("texSurface"), 0);
if (useTexture)
{
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, OGL.texName);
}
GlInfo.LogError("set-texture");
// [txt] [colors] [normals] vertices
GL.BindBuffer(BufferTarget.ArrayBuffer, OGL.VBOid[0]);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, OGL.VBOid[1]);
}
/// <summary>
/// Prepare VBO content and upload it to the GPU.
/// </summary>
void PrepareDataBuffers()
{
if (useVBO &&
scene != null &&
(scene.Triangles > 0 || scene.Lines > 0))
{
// Vertex array: color [normal] coord.
GL.BindBuffer(BufferTarget.ArrayBuffer, VBOid[0]);
int vertexBufferSize = scene.VertexBufferSize(true, true, true, true);
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)vertexBufferSize, IntPtr.Zero, BufferUsageHint.StaticDraw);
IntPtr videoMemoryPtr = GL.MapBuffer(BufferTarget.ArrayBuffer, BufferAccess.WriteOnly);
unsafe
{
stride = scene.FillVertexBuffer((float *)videoMemoryPtr.ToPointer(), true, true, true, true);
}
GL.UnmapBuffer(BufferTarget.ArrayBuffer);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GlInfo.LogError("fill vertex-buffer");
// Index buffer.
GL.BindBuffer(BufferTarget.ElementArrayBuffer, VBOid[1]);
int indices = scene.Triangles * 3 + scene.Lines * 2;
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(indices * sizeof(uint)), IntPtr.Zero, BufferUsageHint.StaticDraw);
videoMemoryPtr = GL.MapBuffer(BufferTarget.ElementArrayBuffer, BufferAccess.WriteOnly);
unsafe
{
scene.FillIndexBuffer((uint *)videoMemoryPtr.ToPointer());
}
GL.UnmapBuffer(BufferTarget.ElementArrayBuffer);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
GlInfo.LogError("fill index-buffer");
}
else
{
if (useVBO)
{
GL.BindBuffer(BufferTarget.ArrayBuffer, VBOid[0]);
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)0, IntPtr.Zero, BufferUsageHint.StaticDraw);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, VBOid[1]);
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)0, IntPtr.Zero, BufferUsageHint.StaticDraw);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
}
}
}
public void InitOpenGL(GLControl glc)
{
// log OpenGL info just for curiosity:
GlInfo.LogGLProperties();
// general OpenGL:
glc.VSync = true;
GL.ClearColor(Color.FromArgb(14, 20, 40)); // darker "navy blue"
GL.Enable(EnableCap.DepthTest);
GL.Enable(EnableCap.VertexProgramPointSize);
GL.ShadeModel(ShadingModel.Flat);
// VBO init:
VBOid = new uint[2]; // one big buffer for vertex data, another buffer for tri/line indices
GL.GenBuffers(2, VBOid);
GlInfo.LogError("VBO init");
VBOlen = new long[2];
}
private void RenderFinish(OpenglState OGL, int vertexCount, int stride)
{
GL.UnmapBuffer(BufferTarget.ArrayBuffer);
// Index buffer.
GL.BindBuffer(BufferTarget.ElementArrayBuffer, OGL.VBOid[1]);
// Set attribute pointers.
IntPtr p = IntPtr.Zero;
if (OGL.activeProgram.HasAttribute("texCoords"))
{
GL.VertexAttribPointer(OGL.activeProgram.GetAttribute("texCoords"), 2, VertexAttribPointerType.Float, false, stride, p);
}
p += Vector2.SizeInBytes;
if (OGL.activeProgram.HasAttribute("color"))
{
GL.VertexAttribPointer(OGL.activeProgram.GetAttribute("color"), 3, VertexAttribPointerType.Float, false, stride, p);
}
p += Vector3.SizeInBytes;
if (OGL.activeProgram.HasAttribute("normal"))
{
GL.VertexAttribPointer(OGL.activeProgram.GetAttribute("normal"), 3, VertexAttribPointerType.Float, false, stride, p);
}
p += Vector3.SizeInBytes;
GL.VertexAttribPointer(OGL.activeProgram.GetAttribute("position"), 3, VertexAttribPointerType.Float, false, stride, p);
GlInfo.LogError("triangles-set-attrib-pointers");
// The drawing command itself.
GL.DrawElements(PrimitiveType.Triangles, vertexCount, DrawElementsType.UnsignedInt, IntPtr.Zero);
GlInfo.LogError("triangles-draw-elements");
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
GL.UseProgram(0);
OGL.SetVertexAttrib(false);
}
/// <summary>
/// OpenGL init code.
/// </summary>
void InitOpenGL()
{
// Log OpenGL info just for curiosity.
GlInfo.LogGLProperties();
// General OpenGL.
glControl1.VSync = true;
GL.ClearColor(Color.FromArgb(14, 20, 40)); // darker "navy blue"
GL.Enable(EnableCap.DepthTest);
GL.Enable(EnableCap.VertexProgramPointSize);
GL.ShadeModel(ShadingModel.Flat);
// VBO init:
VBOid = new uint[2]; // one big buffer for vertex data, another buffer for tri/line indices
GL.GenBuffers(2, VBOid);
GlInfo.LogError("VBO init");
VBOlen = new int[2]; // zeroes..
// Texture.
GenerateTexture();
}
//====================================================================
// Rendering - OpenGL
//====================================================================
/// <summary>
/// OpenGL init code (cold init).
/// </summary>
public void InitOpenGL(GLControl glc)
{
// Log OpenGL info just for curiosity.
GlInfo.LogGLProperties();
// General OpenGL.
glc.VSync = true;
GL.ClearColor(Color.FromArgb(14, 20, 40)); // darker "navy blue"
GL.Enable(EnableCap.DepthTest);
GL.Enable(EnableCap.VertexProgramPointSize);
GL.ShadeModel(ShadingModel.Flat);
// VBO init.
VBOid = new uint[2]; // one big buffer for vertex data, another buffer for tri/line indices
GL.GenBuffers(2, VBOid);
if (GlInfo.LogError("VBO init"))
{
Application.Exit();
}
VBOlen = new long[2]; // current buffer lenghts in bytes
// Shaders.
InitShaderRepository();
if (!SetupShaders())
{
Util.Log("Shader setup failed, giving up...");
Application.Exit();
}
// Only shader VertexAttribPointers() or the very old glVertex() stuff.
GL.DisableClientState(ArrayCap.VertexArray);
GL.DisableClientState(ArrayCap.TextureCoordArray);
GL.DisableClientState(ArrayCap.NormalArray);
GL.DisableClientState(ArrayCap.ColorArray);
// Texture.
texName = GenerateTexture();
}
/// <summary>
/// OpenGL init code.
/// </summary>
public void InitOpenGL()
{
// log OpenGL info just for curiosity:
GlInfo.LogGLProperties();
// general OpenGL:
glC.VSync = true;
GL.ClearColor(Color.FromArgb(30, 40, 90));
GL.Enable(EnableCap.DepthTest);
GL.ShadeModel(ShadingModel.Flat);
// VBO init:
VBOid = new uint[2]; // one big buffer for vertex data, another buffer for tri/line indices
GL.GenBuffers(2, VBOid);
GlInfo.LogError("VBO init");
// shaders:
canShaders = SetupShaders();
// texture:
GenerateTexture();
}
/// <summary>
/// Initialize VBO buffers.
/// Determine maximum buffer sizes and allocate VBO objects.
/// Vertex buffer:
/// <list type=">">
/// <item>cube - triangles</item>
/// </list>
/// Index buffer:
/// <list type=">">
/// <item>cube - triangles</item>
/// </list>
/// </summary>
unsafe void InitDataBuffers()
{
puz.Dirty = false;
// Init data buffers for current simulation state.
// triangles: determine maximum stride, maximum vertices and indices
float *ptr = null;
uint * iptr = null;
uint origin = 0;
int stride = 0;
// Vertex-buffer size.
int maxVB;
maxVB = Align(puz.cube.TriangleVertices(ref ptr, ref origin, out stride, true, true, true, true));
// maxVB contains maximal vertex-buffer size for all batches
// Index-buffer size.
int maxIB;
maxIB = Align(puz.cube.TriangleIndices(ref iptr, 0));
// maxIB contains maximal index-buffer size for all batches
VBOlen[0] = maxVB;
VBOlen[1] = maxIB;
// Vertex buffer in VBO[ 0 ].
GL.BindBuffer(BufferTarget.ArrayBuffer, VBOid[0]);
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)VBOlen[0], IntPtr.Zero, BufferUsageHint.DynamicDraw);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GlInfo.LogError("allocate vertex-buffer");
// Index buffer in VBO[ 1 ].
GL.BindBuffer(BufferTarget.ElementArrayBuffer, VBOid[1]);
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)VBOlen[1], IntPtr.Zero, BufferUsageHint.DynamicDraw);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
GlInfo.LogError("allocate index-buffer");
}
/// <summary>
/// Rendering code itself (separated for clarity).
/// </summary>
void RenderScene()
{
// Scene rendering.
if (scene != null &&
(scene.Lines > 0 || scene.Triangles > 0) && // scene is nonempty => render it
useVBO)
{
GL.LineWidth(scene.LineWidth);
// [txt] [colors] [normals] vertices
GL.BindBuffer(BufferTarget.ArrayBuffer, VBOid[0]);
IntPtr p = IntPtr.Zero;
if (useShaders)
{
SetVertexPointer(false);
SetVertexAttrib(true);
// Using GLSL shaders.
GL.UseProgram(activeProgram.Id);
// Uniforms.
Matrix4 modelView = cam.ModelView;
Matrix4 projection = cam.Projection;
Vector3 eye = cam.Eye;
GL.UniformMatrix4(activeProgram.GetUniform("matrixModelView"), false, ref modelView);
GL.UniformMatrix4(activeProgram.GetUniform("matrixProjection"), false, ref projection);
GL.Uniform3(activeProgram.GetUniform("globalAmbient"), ref globalAmbient);
GL.Uniform3(activeProgram.GetUniform("lightColor"), ref whiteLight);
GL.Uniform3(activeProgram.GetUniform("lightPosition"), ref lightPosition);
GL.Uniform3(activeProgram.GetUniform("eyePosition"), ref eye);
GL.Uniform3(activeProgram.GetUniform("Ka"), ref matAmbient);
GL.Uniform3(activeProgram.GetUniform("Kd"), ref matDiffuse);
GL.Uniform3(activeProgram.GetUniform("Ks"), ref matSpecular);
GL.Uniform1(activeProgram.GetUniform("shininess"), matShininess);
// Color handling.
bool useGlobalColor = checkGlobalColor.Checked;
if (!scene.HasColors())
{
useGlobalColor = true;
}
GL.Uniform1(activeProgram.GetUniform("globalColor"), useGlobalColor ? 1 : 0);
// Shading.
bool shadingPhong = checkPhong.Checked;
bool shadingGouraud = checkSmooth.Checked;
if (!shadingGouraud)
{
shadingPhong = false;
}
GL.Uniform1(activeProgram.GetUniform("shadingPhong"), shadingPhong ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("shadingGouraud"), shadingGouraud ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("useAmbient"), checkAmbient.Checked ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("useDiffuse"), checkDiffuse.Checked ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("useSpecular"), checkSpecular.Checked ? 1 : 0);
GlInfo.LogError("set-uniforms");
// Texture handling.
bool useTexture = checkTexture.Checked;
if (!scene.HasTxtCoords() ||
texName == 0)
{
useTexture = false;
}
GL.Uniform1(activeProgram.GetUniform("useTexture"), useTexture ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("texSurface"), 0);
if (useTexture)
{
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, texName);
}
GlInfo.LogError("set-texture");
if (activeProgram.HasAttribute("texCoords"))
{
GL.VertexAttribPointer(activeProgram.GetAttribute("texCoords"), 2, VertexAttribPointerType.Float, false, stride, p);
}
if (scene.HasTxtCoords())
{
p += Vector2.SizeInBytes;
}
if (activeProgram.HasAttribute("color"))
{
GL.VertexAttribPointer(activeProgram.GetAttribute("color"), 3, VertexAttribPointerType.Float, false, stride, p);
}
if (scene.HasColors())
{
p += Vector3.SizeInBytes;
}
if (activeProgram.HasAttribute("normal"))
{
GL.VertexAttribPointer(activeProgram.GetAttribute("normal"), 3, VertexAttribPointerType.Float, false, stride, p);
}
if (scene.HasNormals())
{
p += Vector3.SizeInBytes;
}
GL.VertexAttribPointer(activeProgram.GetAttribute("position"), 3, VertexAttribPointerType.Float, false, stride, p);
GlInfo.LogError("set-attrib-pointers");
// Index buffer.
GL.BindBuffer(BufferTarget.ElementArrayBuffer, VBOid[1]);
// Engage!
if (scene.Triangles > 0)
{
GL.DrawElements(PrimitiveType.Triangles, scene.Triangles * 3, DrawElementsType.UnsignedInt, IntPtr.Zero);
}
else
{
GL.DrawElements(PrimitiveType.Lines, scene.Lines * 2, DrawElementsType.UnsignedInt, IntPtr.Zero);
}
GlInfo.LogError("draw-elements-shader");
// Cleanup.
GL.UseProgram(0);
if (useTexture)
{
GL.BindTexture(TextureTarget.Texture2D, 0);
}
}
else
{
SetVertexAttrib(false);
SetVertexPointer(true);
// Texture handling.
bool useTexture = checkTexture.Checked;
if (!scene.HasTxtCoords() ||
texName == 0)
{
useTexture = false;
}
if (useTexture)
{
GL.Enable(EnableCap.Texture2D);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, texName);
GL.TexEnv(TextureEnvTarget.TextureEnv, TextureEnvParameter.TextureEnvMode, (int)TextureEnvMode.Replace);
}
// Using FFP.
if (scene.HasTxtCoords())
{
GL.TexCoordPointer(2, TexCoordPointerType.Float, stride, p);
p += Vector2.SizeInBytes;
}
if (scene.HasColors())
{
GL.ColorPointer(3, ColorPointerType.Float, stride, p);
p += Vector3.SizeInBytes;
}
if (scene.HasNormals())
{
GL.NormalPointer(NormalPointerType.Float, stride, p);
p += Vector3.SizeInBytes;
}
GL.VertexPointer(3, VertexPointerType.Float, stride, p);
// Index buffer.
GL.BindBuffer(BufferTarget.ElementArrayBuffer, VBOid[1]);
// Engage!
if (scene.Triangles > 0)
{
GL.DrawElements(PrimitiveType.Triangles, scene.Triangles * 3, DrawElementsType.UnsignedInt, IntPtr.Zero);
}
else
{
GL.DrawElements(PrimitiveType.Lines, scene.Lines * 2, DrawElementsType.UnsignedInt, IntPtr.Zero);
}
GlInfo.LogError("draw-elements-ffp");
if (useTexture)
{
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.Disable(EnableCap.Texture2D);
}
}
triangleCounter += scene.Triangles + scene.Lines;
}
else // color cube
{
SetVertexPointer(false);
SetVertexAttrib(false);
GL.Begin(PrimitiveType.Quads);
GL.Color3(0.0f, 1.0f, 0.0f); // Set The Color To Green
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Top)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Top)
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Bottom Left Of The Quad (Top)
GL.Vertex3(1.0f, 1.0f, 1.0f); // Bottom Right Of The Quad (Top)
GL.Color3(1.0f, 0.5f, 0.0f); // Set The Color To Orange
GL.Vertex3(1.0f, -1.0f, 1.0f); // Top Right Of The Quad (Bottom)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Top Left Of The Quad (Bottom)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Bottom)
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Bottom)
GL.Color3(1.0f, 0.0f, 0.0f); // Set The Color To Red
GL.Vertex3(1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Front)
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Front)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad (Front)
GL.Vertex3(1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad (Front)
GL.Color3(1.0f, 1.0f, 0.0f); // Set The Color To Yellow
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Back)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Back)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Back)
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Back)
GL.Color3(0.0f, 0.0f, 1.0f); // Set The Color To Blue
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Left)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Left)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Left)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad (Left)
GL.Color3(1.0f, 0.0f, 1.0f); // Set The Color To Violet
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Right)
GL.Vertex3(1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Right)
GL.Vertex3(1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad (Right)
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Right)
GL.End();
triangleCounter += 12;
}
// Support: axes.
if (checkAxes.Checked)
{
float origWidth = GL.GetFloat(GetPName.LineWidth);
float origPoint = GL.GetFloat(GetPName.PointSize);
// Axes.
GL.LineWidth(2.0f);
GL.Begin(PrimitiveType.Lines);
GL.Color3(1.0f, 0.1f, 0.1f);
GL.Vertex3(center);
GL.Vertex3(center + new Vector3(0.5f, 0.0f, 0.0f) * diameter);
GL.Color3(0.0f, 1.0f, 0.0f);
GL.Vertex3(center);
GL.Vertex3(center + new Vector3(0.0f, 0.5f, 0.0f) * diameter);
GL.Color3(0.2f, 0.2f, 1.0f);
GL.Vertex3(center);
GL.Vertex3(center + new Vector3(0.0f, 0.0f, 0.5f) * diameter);
GL.End();
// Support: pointing.
if (pointOrigin != null)
{
GL.Begin(PrimitiveType.Lines);
GL.Color3(1.0f, 1.0f, 0.0f);
GL.Vertex3(pointOrigin.Value);
GL.Vertex3(pointTarget);
GL.Color3(1.0f, 0.0f, 0.0f);
GL.Vertex3(pointOrigin.Value);
GL.Vertex3(eye);
GL.End();
GL.PointSize(4.0f);
GL.Begin(PrimitiveType.Points);
GL.Color3(1.0f, 0.0f, 0.0f);
GL.Vertex3(pointOrigin.Value);
GL.Color3(0.0f, 1.0f, 0.2f);
GL.Vertex3(pointTarget);
GL.Color3(1.0f, 1.0f, 1.0f);
if (spot != null)
{
GL.Vertex3(spot.Value);
}
GL.Vertex3(eye);
GL.End();
}
// Support: frustum.
if (frustumFrame.Count >= 8)
{
GL.LineWidth(2.0f);
GL.Begin(PrimitiveType.Lines);
GL.Color3(1.0f, 0.0f, 0.0f);
GL.Vertex3(frustumFrame[0]);
GL.Vertex3(frustumFrame[1]);
GL.Vertex3(frustumFrame[1]);
GL.Vertex3(frustumFrame[3]);
GL.Vertex3(frustumFrame[3]);
GL.Vertex3(frustumFrame[2]);
GL.Vertex3(frustumFrame[2]);
GL.Vertex3(frustumFrame[0]);
GL.Color3(1.0f, 1.0f, 1.0f);
GL.Vertex3(frustumFrame[0]);
GL.Vertex3(frustumFrame[4]);
GL.Vertex3(frustumFrame[1]);
GL.Vertex3(frustumFrame[5]);
GL.Vertex3(frustumFrame[2]);
GL.Vertex3(frustumFrame[6]);
GL.Vertex3(frustumFrame[3]);
GL.Vertex3(frustumFrame[7]);
GL.Color3(0.0f, 1.0f, 0.0f);
GL.Vertex3(frustumFrame[4]);
GL.Vertex3(frustumFrame[5]);
GL.Vertex3(frustumFrame[5]);
GL.Vertex3(frustumFrame[7]);
GL.Vertex3(frustumFrame[7]);
GL.Vertex3(frustumFrame[6]);
GL.Vertex3(frustumFrame[6]);
GL.Vertex3(frustumFrame[4]);
GL.End();
}
GL.LineWidth(origWidth);
GL.PointSize(origPoint);
}
}
//====================================================================
// Rendering - graph
//====================================================================
/// <summary>
/// Rendering code itself (separated for clarity).
/// </summary>
/// <param name="cam">Camera parameters.</param>
/// <param name="style">Current rendering style.</param>
/// <param name="primitiveCounter">Number of GL primitives rendered.</param>
public void RenderScene(
IDynamicCamera cam,
RenderingStyle style,
ref long primitiveCounter)
{
// Scene rendering.
if (Form1.form.drawGraph &&
VBOlen[0] > 0L &&
activeProgram != null) // buffers are nonempty & shaders are ready => render
{
// Vertex buffer: [texture] [color] [normal] coordinate
GL.BindBuffer(BufferTarget.ArrayBuffer, VBOid[0]);
// GLSL shaders.
activeProgram.EnableVertexAttribArrays();
GL.UseProgram(activeProgram.Id);
// Uniforms.
Matrix4 modelView = cam.ModelView;
Matrix4 projection = cam.Projection;
Vector3 eye = cam.Eye;
GL.UniformMatrix4(activeProgram.GetUniform("matrixModelView"), false, ref modelView);
GL.UniformMatrix4(activeProgram.GetUniform("matrixProjection"), false, ref projection);
GL.Uniform3(activeProgram.GetUniform("globalAmbient"), ref style.globalAmbient);
GL.Uniform3(activeProgram.GetUniform("lightColor"), ref style.whiteLight);
GL.Uniform3(activeProgram.GetUniform("lightPosition"), ref style.lightPosition);
GL.Uniform3(activeProgram.GetUniform("eyePosition"), ref eye);
GL.Uniform3(activeProgram.GetUniform("Ka"), ref style.matAmbient);
GL.Uniform3(activeProgram.GetUniform("Kd"), ref style.matDiffuse);
GL.Uniform3(activeProgram.GetUniform("Ks"), ref style.matSpecular);
GL.Uniform1(activeProgram.GetUniform("shininess"), style.matShininess);
// Color handling.
bool useGlobalColor = style.useGlobalColor;
if (!haveColors) // use global color if vertices haven't got color!
{
useGlobalColor = true;
}
GL.Uniform1(activeProgram.GetUniform("globalColor"), useGlobalColor ? 1 : 0);
// Shading, color interpolation.
// shadingGouraud <=> lighting is computed in VS
// shadingPhong <=> lighting is computed in FS (normal interpolation)
// shadingSmooth <=> colors are interpolated in FS (color interpolation)
bool shadingGouraud = style.lighting && !style.phong;
bool shadingPhong = style.lighting && style.phong;
bool shadingSmooth = style.smooth;
GL.Uniform1(activeProgram.GetUniform("shadingGouraud"), shadingGouraud ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("shadingPhong"), shadingPhong ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("shadingSmooth"), shadingSmooth ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("useAmbient"), style.useAmbient ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("useDiffuse"), style.useDiffuse ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("useSpecular"), style.useSpecular ? 1 : 0);
GlInfo.LogError("set-uniforms");
// Color texture in slot #0.
bool okTexture = style.texture && haveTexture;
GL.Uniform1(activeProgram.GetUniform("useTexture"), okTexture ? 1 : 0);
GL.Uniform1(activeProgram.GetUniform("texSurface"), 0);
if (okTexture)
{
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, texName);
}
GlInfo.LogError("set-texture");
// Vertex attributes.
IntPtr p = IntPtr.Zero;
if (activeProgram.HasAttribute("texCoords"))
{
GL.VertexAttribPointer(activeProgram.GetAttribute("texCoords"), 2, VertexAttribPointerType.Float, false, stride, p);
}
if (haveTexture)
{
p += Vector2.SizeInBytes;
}
if (activeProgram.HasAttribute("color"))
{
GL.VertexAttribPointer(activeProgram.GetAttribute("color"), 3, VertexAttribPointerType.Float, false, stride, p);
}
if (haveColors)
{
p += Vector3.SizeInBytes;
}
if (activeProgram.HasAttribute("normal"))
{
GL.VertexAttribPointer(activeProgram.GetAttribute("normal"), 3, VertexAttribPointerType.Float, false, stride, p);
}
if (haveNormals)
{
p += Vector3.SizeInBytes;
}
GL.VertexAttribPointer(activeProgram.GetAttribute("position"), 3, VertexAttribPointerType.Float, false, stride, p);
GlInfo.LogError("set-attrib-pointers");
// Index buffer.
GL.BindBuffer(BufferTarget.ElementArrayBuffer, VBOid[1]);
// Draw!
// !!!{{ CHANGE THIS PART if you want to add axes, legend, etc...
// Triangle part of the scene.
// Draw total 'vertices' vertices from the beginning of the index-buffer,
// that gives us 'vertices/3' triangles.
GL.DrawElements(PrimitiveType.Triangles, vertices, DrawElementsType.UnsignedInt, IntPtr.Zero);
GlInfo.LogError("draw-elements-shader");
// How to draw lines (e.g. coordinate axes):
//GL.DrawElements(PrimitiveType.Lines, lineVertices, DrawElementsType.UnsignedInt, lineOffset);
// lineVertices ... number of vertex indices for lines (e.g. 'lineVertices/2' lines)
// lineOffset ... start offset in the index-buffer
primitiveCounter += vertices / 3;
// !!!}}
// Cleanup.
GL.UseProgram(0);
if (okTexture)
{
GL.BindTexture(TextureTarget.Texture2D, 0);
}
}
else
{
// Color cube in very old OpenGL style!
GL.Begin(PrimitiveType.Quads);
GL.Color3(0.0f, 1.0f, 0.0f); // Set The Color To Green
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Top)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Top)
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Bottom Left Of The Quad (Top)
GL.Vertex3(1.0f, 1.0f, 1.0f); // Bottom Right Of The Quad (Top)
GL.Color3(1.0f, 0.5f, 0.0f); // Set The Color To Orange
GL.Vertex3(1.0f, -1.0f, 1.0f); // Top Right Of The Quad (Bottom)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Top Left Of The Quad (Bottom)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Bottom)
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Bottom)
GL.Color3(1.0f, 0.0f, 0.0f); // Set The Color To Red
GL.Vertex3(1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Front)
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Front)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad (Front)
GL.Vertex3(1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad (Front)
GL.Color3(1.0f, 1.0f, 0.0f); // Set The Color To Yellow
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Back)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Back)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Back)
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Back)
GL.Color3(0.0f, 0.0f, 1.0f); // Set The Color To Blue
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Left)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Left)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Left)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad (Left)
GL.Color3(1.0f, 0.0f, 1.0f); // Set The Color To Violet
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Right)
GL.Vertex3(1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Right)
GL.Vertex3(1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad (Right)
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Right)
GL.End();
primitiveCounter += 12;
}
}
/// <summary>
/// Renders the simulated data from the special object.
/// </summary>
/// <param name="OGL">Current OpenGL state object.</param>
/// <param name="data">Data to render.</param>
/// <returns>Number of actually drawn primitives.</returns>
public long Render(OpenglState OGL, MarblesRenderData data)
{
// {{ TODO: modify the rendering code!
// Scene rendering from VBOs.
OGL.SetVertexAttrib(true);
// Using GLSL shaders.
GL.UseProgram(OGL.activeProgram.Id);
// Uniforms.
// Camera, projection, ..
Matrix4 modelView = OGL.GetModelView();
Matrix4 modelViewInv = OGL.GetModelViewInv();
Matrix4 projection = OGL.GetProjection();
Vector3 eye = OGL.GetEyePosition();
// Give matrices to shaders.
GL.UniformMatrix4(OGL.activeProgram.GetUniform("matrixModelView"), false, ref modelView);
GL.UniformMatrix4(OGL.activeProgram.GetUniform("matrixProjection"), false, ref projection);
// Lighting constants.
GL.Uniform3(OGL.activeProgram.GetUniform("globalAmbient"), ref OGL.globalAmbient);
GL.Uniform3(OGL.activeProgram.GetUniform("lightColor"), ref OGL.whiteLight);
GL.Uniform3(OGL.activeProgram.GetUniform("lightPosition"), ref OGL.lightPosition);
GL.Uniform3(OGL.activeProgram.GetUniform("eyePosition"), ref eye);
GL.Uniform3(OGL.activeProgram.GetUniform("Ka"), ref OGL.matAmbient);
GL.Uniform3(OGL.activeProgram.GetUniform("Kd"), ref OGL.matDiffuse);
GL.Uniform3(OGL.activeProgram.GetUniform("Ks"), ref OGL.matSpecular);
GL.Uniform1(OGL.activeProgram.GetUniform("shininess"), OGL.matShininess);
// Global color handling.
bool useColors = !OGL.useGlobalColor;
GL.Uniform1(OGL.activeProgram.GetUniform("globalColor"), useColors ? 0 : 1);
// Use varying normals?
bool useNormals = OGL.useNormals;
GL.Uniform1(OGL.activeProgram.GetUniform("useNormal"), useNormals ? 1 : 0);
GlInfo.LogError("set-uniforms");
// Texture handling.
bool useTexture = OGL.useTexture;
GL.Uniform1(OGL.activeProgram.GetUniform("useTexture"), useTexture ? 1 : 0);
GL.Uniform1(OGL.activeProgram.GetUniform("texSurface"), 0);
if (useTexture)
{
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, OGL.texName);
}
GlInfo.LogError("set-texture");
// [txt] [colors] [normals] vertices
GL.BindBuffer(BufferTarget.ArrayBuffer, OGL.VBOid[0]);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, OGL.VBOid[1]);
int marbles = data.radii.Count;
int stride = sizeof(float) * 11; // float[2] txt, float[3] color, float[3] normal, float[3] position
int triangles = marbles;
IntPtr videoMemoryPtr;
if (marbles != lastMarbles)
{
// Relocate the buffers.
// Vertex array: [ txt color coord ]
GL.BindBuffer(BufferTarget.ArrayBuffer, OGL.VBOid[0]);
int vertexBufferSize = (marbles * 3) * stride; // TODO: marble should be drawn as a SPHERE, not a triangle..
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)vertexBufferSize, IntPtr.Zero, BufferUsageHint.DynamicDraw);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
// Fill index array.
GL.BindBuffer(BufferTarget.ElementArrayBuffer, OGL.VBOid[1]);
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)((triangles * 3) * sizeof(uint)), IntPtr.Zero, BufferUsageHint.StaticDraw);
videoMemoryPtr = GL.MapBuffer(BufferTarget.ElementArrayBuffer, BufferAccess.WriteOnly);
unsafe
{
uint *ptr = (uint *)videoMemoryPtr.ToPointer();
for (uint i = 0; i < triangles * 3; i++)
{
*ptr++ = i;
}
}
GL.UnmapBuffer(BufferTarget.ElementArrayBuffer);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
lastMarbles = marbles;
}
// Refill vertex buffer.
GL.BindBuffer(BufferTarget.ArrayBuffer, OGL.VBOid[0]);
videoMemoryPtr = GL.MapBuffer(BufferTarget.ArrayBuffer, BufferAccess.WriteOnly);
unsafe
{
float *ptr = (float *)videoMemoryPtr.ToPointer();
for (int i = 0; i < marbles; i++)
{
float rad = data.radii[i];
float r = data.colors[i].R / 255.0f;
float g = data.colors[i].G / 255.0f;
float b = data.colors[i].B / 255.0f;
// txt[2], color[3], normal[3], position[3]
*ptr++ = 0.3f;
*ptr++ = 0.3f;
*ptr++ = r;
*ptr++ = g;
*ptr++ = b;
*ptr++ = 0.0f;
*ptr++ = 0.0f;
*ptr++ = 1.0f;
*ptr++ = data.centers[i].X;
*ptr++ = data.centers[i].Y;
*ptr++ = data.centers[i].Z;
// txt[2], color[3], normal[3], position[3]
*ptr++ = 0.7f;
*ptr++ = 0.3f;
*ptr++ = r;
*ptr++ = g;
*ptr++ = b;
*ptr++ = 0.0f;
*ptr++ = 0.0f;
*ptr++ = 1.0f;
*ptr++ = data.centers[i].X + rad;
*ptr++ = data.centers[i].Y;
*ptr++ = data.centers[i].Z;
// txt[2], color[3], normal[3], position[3]
*ptr++ = 0.3f;
*ptr++ = 0.7f;
*ptr++ = r;
*ptr++ = g;
*ptr++ = b;
*ptr++ = 0.0f;
*ptr++ = 0.0f;
*ptr++ = 1.0f;
*ptr++ = data.centers[i].X;
*ptr++ = data.centers[i].Y + rad;
*ptr++ = data.centers[i].Z;
}
}
GL.UnmapBuffer(BufferTarget.ArrayBuffer);
// Index buffer.
GL.BindBuffer(BufferTarget.ElementArrayBuffer, OGL.VBOid[1]);
// Set attribute pointers.
IntPtr p = IntPtr.Zero;
if (OGL.activeProgram.HasAttribute("texCoords"))
{
GL.VertexAttribPointer(OGL.activeProgram.GetAttribute("texCoords"), 2, VertexAttribPointerType.Float, false, stride, p);
}
p += Vector2.SizeInBytes;
if (OGL.activeProgram.HasAttribute("color"))
{
GL.VertexAttribPointer(OGL.activeProgram.GetAttribute("color"), 3, VertexAttribPointerType.Float, false, stride, p);
}
p += Vector3.SizeInBytes;
if (OGL.activeProgram.HasAttribute("normal"))
{
GL.VertexAttribPointer(OGL.activeProgram.GetAttribute("normal"), 3, VertexAttribPointerType.Float, false, stride, p);
}
p += Vector3.SizeInBytes;
GL.VertexAttribPointer(OGL.activeProgram.GetAttribute("position"), 3, VertexAttribPointerType.Float, false, stride, p);
GlInfo.LogError("triangles-set-attrib-pointers");
// The drawing command itself.
GL.DrawElements(PrimitiveType.Triangles, triangles * 3, DrawElementsType.UnsignedInt, IntPtr.Zero);
GlInfo.LogError("triangles-draw-elements");
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
GL.UseProgram(0);
OGL.SetVertexAttrib(false);
return(triangles);
// }}
}
/// <summary>
/// Rendering code itself (separated for clarity).
/// </summary>
void RenderScene()
{
if (puz != null)
{
if (VBOlen[0] == 0 ||
VBOlen[1] == 0 ||
puz.Dirty)
{
InitDataBuffers();
}
if (VBOlen[0] > 0 ||
VBOlen[1] > 0)
{
// Texture handling.
bool useTexture = checkTexture.Checked;
if (texName == 0)
{
useTexture = false;
}
if (useTexture)
{
GL.Enable(EnableCap.Texture2D);
GL.ActiveTexture(TextureUnit.Texture0);
GL.BindTexture(TextureTarget.Texture2D, texName);
GL.TexEnv(TextureEnvTarget.TextureEnv, TextureEnvParameter.TextureEnvMode, (int)TextureEnvMode.Replace);
}
// Scene rendering from VBOs:
EnableArrays(useTexture);
// [txt] [colors] [normals] [ptsize] vertices
GL.BindBuffer(BufferTarget.ArrayBuffer, VBOid[0]);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, VBOid[1]);
int stride; // stride for vertex arrays
int indices; // number of indices for index arrays
//-------------------------
// Draw all triangles.
IntPtr vertexPtr = GL.MapBuffer(BufferTarget.ArrayBuffer, BufferAccess.WriteOnly);
IntPtr indexPtr = GL.MapBuffer(BufferTarget.ElementArrayBuffer, BufferAccess.WriteOnly);
unsafe
{
float *ptr = (float *)vertexPtr.ToPointer();
uint * iptr = (uint *)indexPtr.ToPointer();
indices = puz.FillTriangleData(ref ptr, ref iptr, out stride, useTexture, !useTexture, false, false);
}
GL.UnmapBuffer(BufferTarget.ArrayBuffer);
GL.UnmapBuffer(BufferTarget.ElementArrayBuffer);
IntPtr p = IntPtr.Zero;
// Using FFP.
if (useTexture)
{
GL.TexCoordPointer(2, TexCoordPointerType.Float, stride, p);
p += Vector2.SizeInBytes;
}
if (!useTexture)
{
GL.ColorPointer(3, ColorPointerType.Float, stride, p);
p += Vector3.SizeInBytes;
}
GL.VertexPointer(3, VertexPointerType.Float, stride, p);
// Index buffer.
GL.BindBuffer(BufferTarget.ElementArrayBuffer, VBOid[1]);
// Engage!
GL.DrawElements(PrimitiveType.Triangles, indices, DrawElementsType.UnsignedInt, IntPtr.Zero);
GlInfo.LogError("draw-elements-ffp");
if (useTexture)
{
GL.BindTexture(TextureTarget.Texture2D, 0);
GL.Disable(EnableCap.Texture2D);
}
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
DisableArrays();
}
}
else
{
DisableArrays();
// Default: draw trivial cube using immediate mode.
GL.Begin(PrimitiveType.Quads);
GL.Color3(0.0f, 1.0f, 0.0f); // Set The Color To Green
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Top)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Top)
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Bottom Left Of The Quad (Top)
GL.Vertex3(1.0f, 1.0f, 1.0f); // Bottom Right Of The Quad (Top)
GL.Color3(1.0f, 0.5f, 0.0f); // Set The Color To Orange
GL.Vertex3(1.0f, -1.0f, 1.0f); // Top Right Of The Quad (Bottom)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Top Left Of The Quad (Bottom)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Bottom)
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Bottom)
GL.Color3(1.0f, 0.0f, 0.0f); // Set The Color To Red
GL.Vertex3(1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Front)
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Front)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad (Front)
GL.Vertex3(1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad (Front)
GL.Color3(1.0f, 1.0f, 0.0f); // Set The Color To Yellow
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Back)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Back)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Back)
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Back)
GL.Color3(0.0f, 0.0f, 1.0f); // Set The Color To Blue
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Left)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Left)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Left)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad (Left)
GL.Color3(1.0f, 0.0f, 1.0f); // Set The Color To Violet
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Right)
GL.Vertex3(1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Right)
GL.Vertex3(1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad (Right)
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Right)
GL.End();
primitiveCounter += 12;
}
// Support: axes
if (checkDebug.Checked)
{
float origWidth = GL.GetFloat(GetPName.LineWidth);
float origPoint = GL.GetFloat(GetPName.PointSize);
// Axes.
GL.LineWidth(2.0f);
GL.Begin(PrimitiveType.Lines);
GL.Color3(1.0f, 0.1f, 0.1f);
GL.Vertex3(center);
GL.Vertex3(center + new Vector3(0.5f, 0.0f, 0.0f) * diameter);
GL.Color3(0.0f, 1.0f, 0.0f);
GL.Vertex3(center);
GL.Vertex3(center + new Vector3(0.0f, 0.5f, 0.0f) * diameter);
GL.Color3(0.2f, 0.2f, 1.0f);
GL.Vertex3(center);
GL.Vertex3(center + new Vector3(0.0f, 0.0f, 0.5f) * diameter);
GL.End();
// Support: pointing
if (pointOrigin != null)
{
GL.Begin(PrimitiveType.Lines);
GL.Color3(1.0f, 1.0f, 0.0f);
GL.Vertex3(pointOrigin.Value);
GL.Vertex3(pointTarget);
GL.End();
GL.PointSize(4.0f);
GL.Begin(PrimitiveType.Points);
GL.Color3(1.0f, 0.0f, 0.0f);
GL.Vertex3(pointOrigin.Value);
GL.Color3(0.0f, 1.0f, 0.2f);
GL.Vertex3(pointTarget);
if (spot != null)
{
GL.Color3(1.0f, 1.0f, 1.0f);
GL.Vertex3(spot.Value);
}
GL.End();
}
// Support: frustum
if (frustumFrame.Count >= 8)
{
GL.LineWidth(2.0f);
GL.Begin(PrimitiveType.Lines);
GL.Color3(1.0f, 0.0f, 0.0f);
GL.Vertex3(frustumFrame[0]);
GL.Vertex3(frustumFrame[1]);
GL.Vertex3(frustumFrame[1]);
GL.Vertex3(frustumFrame[3]);
GL.Vertex3(frustumFrame[3]);
GL.Vertex3(frustumFrame[2]);
GL.Vertex3(frustumFrame[2]);
GL.Vertex3(frustumFrame[0]);
GL.Color3(1.0f, 1.0f, 1.0f);
GL.Vertex3(frustumFrame[0]);
GL.Vertex3(frustumFrame[4]);
GL.Vertex3(frustumFrame[1]);
GL.Vertex3(frustumFrame[5]);
GL.Vertex3(frustumFrame[2]);
GL.Vertex3(frustumFrame[6]);
GL.Vertex3(frustumFrame[3]);
GL.Vertex3(frustumFrame[7]);
GL.Color3(0.0f, 1.0f, 0.0f);
GL.Vertex3(frustumFrame[4]);
GL.Vertex3(frustumFrame[5]);
GL.Vertex3(frustumFrame[5]);
GL.Vertex3(frustumFrame[7]);
GL.Vertex3(frustumFrame[7]);
GL.Vertex3(frustumFrame[6]);
GL.Vertex3(frustumFrame[6]);
GL.Vertex3(frustumFrame[4]);
GL.End();
}
GL.LineWidth(origWidth);
GL.PointSize(origPoint);
}
}