void IRenderable.Render(OpenGL gl, RenderMode renderMode)
{
if (positionBuffer != null && colorBuffer != null && radiusBuffer != null)
{
if (this.shaderProgram == null)
{
this.shaderProgram = InitShader(gl, renderMode);
}
if (this.vertexArrayObject == null)
{
CreateVertexArrayObject(gl, renderMode);
}
BeforeRendering(gl, renderMode);
if (this.RenderGrid && this.vertexArrayObject != null)
{
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(SharpGL.Enumerations.BlendingSourceFactor.SourceAlpha, SharpGL.Enumerations.BlendingDestinationFactor.OneMinusSourceAlpha);
gl.BindVertexArray(this.vertexArrayObject[0]);
gl.DrawArrays(OpenGL.GL_POINTS, 0, count);
gl.BindVertexArray(0);
gl.Disable(OpenGL.GL_BLEND);
}
AfterRendering(gl, renderMode);
}
}
private void InitializeOpenGL()
{
_openGL = new OpenGL();
_openGL.Create(OpenGLVersion.OpenGL2_1, RenderContextType.FBO, Canvas.Width, Canvas.Height, 32, null);
//_openGL.Viewport(0, 0, Canvas.Width, Canvas.Height);
_openGL.ShadeModel(OpenGL.GL_SMOOTH);
_openGL.ClearColor(1.0f, 0.0f, 0.0f, 1.0f);
_openGL.ClearDepth(1.0f);
_openGL.Enable(OpenGL.GL_DEPTH_TEST);
_openGL.DepthFunc(OpenGL.GL_LEQUAL);
_openGL.Hint(OpenGL.GL_PERSPECTIVE_CORRECTION_HINT, OpenGL.GL_NICEST);
_openGL.Enable(OpenGL.GL_BLEND);
_openGL.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
//_openGL.BlendFunc(BlendingSourceFactor.SourceAlpha, BlendingDestinationFactor.DestinationAlpha);
_openGL.Enable(OpenGL.GL_LINE_SMOOTH);
_openGL.Hint(OpenGL.GL_LINE_SMOOTH_HINT, OpenGL.GL_NICEST);
_openGL.Clear(OpenGL.GL_DEPTH_BUFFER_BIT);
//_openGL.Ortho2D(0, Canvas.Width, Canvas.Height, 0);
_openGL.Viewport(0, 0, Canvas.Width, Canvas.Height);
_openGL.MatrixMode(MatrixMode.Projection);
_openGL.LoadIdentity();
_openGL.Ortho(-1, 1, -1, 1, -1, 1);
}
public static void DrawTriangle(OpenGL gl, Vector3 a, Vector3 b, Vector3 c, Color32 color, bool usePolygonOffset)
{
gl.PushAttrib(OpenGL.GL_ENABLE_BIT);
gl.Disable(OpenGL.GL_LIGHTING);
gl.Disable(OpenGL.GL_TEXTURE_2D);
gl.Enable(OpenGL.GL_COLOR_MATERIAL);
gl.ColorMaterial(OpenGL.GL_FRONT_AND_BACK, OpenGL.GL_AMBIENT_AND_DIFFUSE);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
gl.Enable(OpenGL.GL_BLEND);
if (usePolygonOffset)
{
gl.Enable(OpenGL.GL_POLYGON_OFFSET_FILL);
gl.PolygonOffset(-1.0f, -1.0f);
}
gl.Begin(OpenGL.GL_TRIANGLES);
gl.Color(color.R_Double, color.G_Double, color.B_Double, color.A_Double);
gl.Vertex(a.x, a.y, a.z);
gl.Vertex(b.x, b.y, b.z);
gl.Vertex(c.x, c.y, c.z);
gl.End();
gl.PopAttrib();
}
private void preGL2D(OpenGL gl, int width, int height)
{
gl.DrawBuffer(OpenGL.GL_FRONT);
gl.Viewport(0, 0, width, height);
gl.MatrixMode(OpenGL.GL_PROJECTION);
gl.LoadIdentity();
gl.Ortho(0, width, 0, height, -1, 1);
gl.MatrixMode(OpenGL.GL_MODELVIEW);
gl.LoadIdentity();
// Передвижение полотна при зажатом колёсике
gl.Translate(canvasPositionX, -canvasPositionY, 0);
gl.ShadeModel(OpenGL.GL_SMOOTH);
gl.PixelStore(OpenGL.GL_UNPACK_ALIGNMENT, 4);
gl.Hint(OpenGL.GL_PERSPECTIVE_CORRECTION_HINT, OpenGL.GL_NICEST);
gl.Enable(OpenGL.GL_DEPTH_TEST);
gl.Disable(OpenGL.GL_CULL_FACE);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
gl.Enable(OpenGL.GL_LINE_SMOOTH);
gl.Hint(OpenGL.GL_LINE_SMOOTH_HINT, OpenGL.GL_NICEST);
gl.ClearColor(1, 1, 1, 1);
gl.ClearStencil(0);
gl.ClearDepth(1.0);
gl.DepthFunc(OpenGL.GL_LEQUAL);
gl.Clear(OpenGL.GL_DEPTH_BUFFER_BIT | OpenGL.GL_COLOR_BUFFER_BIT);
}
// Fill rectangle to given coordinates, Z assumed 0. Expected to be used when in Ortho mode.
// Ensure states option is to ensure all enable/disable states to be set before drawing, if false then assumed that correct states are set (optimization)
public static void FillRectangle(OpenGL gl, Vector2 topLeft, Vector2 bottomRight, Color32 color, bool ensureStates)
{
if (ensureStates)
{
gl.PushAttrib(OpenGL.GL_ENABLE_BIT);
gl.Disable(OpenGL.GL_LIGHTING);
gl.Disable(OpenGL.GL_TEXTURE_2D);
gl.Enable(OpenGL.GL_COLOR_MATERIAL);
gl.Enable(OpenGL.GL_BLEND);
gl.ColorMaterial(OpenGL.GL_FRONT_AND_BACK, OpenGL.GL_AMBIENT_AND_DIFFUSE);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
}
gl.Begin(OpenGL.GL_QUADS);
gl.Color(color.R_Double, color.G_Double, color.B_Double, color.A_Double);
gl.Vertex(topLeft.x, topLeft.y);
gl.Vertex(bottomRight.x, topLeft.y);
gl.Vertex(bottomRight.x, bottomRight.y);
gl.Vertex(topLeft.x, bottomRight.y);
gl.End();
if (ensureStates)
{
gl.PopAttrib();
}
}
/// <summary>
/// Sets the attributes.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
public override void SetAttributes(OpenGL gl)
{
if (enableAlphaTest.HasValue && alphaTestFunction.HasValue && alphaTestReferenceValue.HasValue)
{
gl.EnableIf(OpenGL.GL_ALPHA_TEST, enableAlphaTest.Value);
gl.AlphaFunc(alphaTestFunction.Value, alphaTestReferenceValue.Value);
}
if (enableBlend.HasValue && blendingSourceFactor.HasValue && blendingDestinationFactor.HasValue)
{
gl.EnableIf(OpenGL.GL_BLEND, enableBlend.Value);
gl.BlendFunc(blendingSourceFactor.Value, blendingDestinationFactor.Value);
}
if (enableDither.HasValue)
{
gl.EnableIf(OpenGL.GL_DITHER, enableDither.Value);
}
if (drawBufferMode.HasValue)
{
gl.DrawBuffer(drawBufferMode.Value);
}
if (enableLogicOp.HasValue && logicOp.HasValue)
{
gl.EnableIf(OpenGL.GL_COLOR_LOGIC_OP, enableLogicOp.Value);
gl.LogicOp(logicOp.Value);
}
if (colorModeClearColor != null)
{
gl.ClearColor(colorModeClearColor.R, colorModeClearColor.G, colorModeClearColor.B, colorModeClearColor.A);
}
//todowritemask
}
public static uint RegisterTexture(Bitmap textureImage)
{
uint[] textureID = new uint[1];
// Initiate texture
gl.Enable(OpenGL.GL_TEXTURE_2D);
// Get texture ID and save it in the array
gl.GenTextures(1, textureID);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, textureID[0]);
// Enable transparency
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
// Tells OpenGL where are the image pixels/data
IntPtr pixels = textureImage.LockBits(new Rectangle(0, 0, textureImage.Width, textureImage.Height), ImageLockMode.ReadOnly, textureImage.PixelFormat).Scan0;
gl.TexImage2D(OpenGL.GL_TEXTURE_2D, 0, (int)OpenGL.GL_RGBA, textureImage.Width, textureImage.Height, 0, OpenGL.GL_BGRA, OpenGL.GL_UNSIGNED_BYTE, pixels);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MIN_FILTER, OpenGL.GL_LINEAR);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MAG_FILTER, OpenGL.GL_LINEAR);
return(textureID[0]);
}
public override void drawFilled(OpenGL gl)
{
if (!initialized)
{
init(gl);
}
gl.Enable(OpenGL.GL_TEXTURE_2D);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, texture.TextureName);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
gl.Begin(OpenGL.GL_QUADS);
gl.TexCoord(0.0f, 1.0f); gl.Vertex(Pos.X, Pos.Y, Pos.Z); // Bottom Left Of The Texture and Quad
gl.TexCoord(1.0f, 1.0f); gl.Vertex(Pos.X + Size.X, Pos.Y, Pos.Z); // Bottom Right Of The Texture and Quad
gl.TexCoord(1.0f, 0.0f); gl.Vertex(Pos.X + Size.X, Pos.Y + Size.Y, Pos.Z); // Top Right Of The Texture and Quad
gl.TexCoord(0.0f, 0.0f); gl.Vertex(Pos.X, Pos.Y + Size.Y, Pos.Z); // Top Left Of The Texture and Quad
gl.End();
gl.Disable(OpenGL.GL_BLEND);
gl.Disable(OpenGL.GL_TEXTURE_2D);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);
//this.drawBorder(gl);
}
/// <summary>
/// Handles the OpenGLInitialized event of the openGLControl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
private void openGLControl_OpenGLInitialized(object sender, EventArgs e)
{
// Get the OpenGL object.
OpenGL gl = openGLControl.OpenGL;
// Set the clear color.
gl.ClearColor(0, 0, 0, 0);
// light
float[] light = { 1.0f, 1.0f, 1.0f, 0.8f };
float[] amblight = { 0.5f, 0.5f, 0.5f, 0.8f };
gl.LightModel(LightModelParameter.Ambient, amblight);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_POSITION, light);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_DIFFUSE, light);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_SPECULAR, light);
gl.ShadeModel(OpenGL.GL_SMOOTH);
gl.Enable(OpenGL.GL_LIGHTING);
gl.Enable(OpenGL.GL_LIGHT0);
gl.Enable(OpenGL.GL_DEPTH_TEST);
gl.Enable(OpenGL.GL_LINE_SMOOTH);
gl.Hint(HintTarget.LineSmooth, HintMode.Nicest);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(BlendingSourceFactor.SourceAlpha, BlendingDestinationFactor.OneMinusSourceAlpha);
//gl.Enable(OpenGL.GL_NORMALIZE);
}
/// <summary>
/// Sets the attributes.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
public override void SetAttributes(OpenGL gl)
{
if(enableAlphaTest.HasValue && alphaTestFunction.HasValue && alphaTestReferenceValue.HasValue)
{
gl.EnableIf(OpenGL.GL_ALPHA_TEST, enableAlphaTest.Value);
gl.AlphaFunc(alphaTestFunction.Value, alphaTestReferenceValue.Value);
}
if(enableBlend.HasValue && blendingSourceFactor.HasValue && blendingDestinationFactor.HasValue)
{
gl.EnableIf(OpenGL.GL_BLEND, enableBlend.Value);
gl.BlendFunc(blendingSourceFactor.Value, blendingDestinationFactor.Value);
}
if(enableDither.HasValue) gl.EnableIf(OpenGL.GL_DITHER, enableDither.Value);
if(drawBufferMode.HasValue) gl.DrawBuffer(drawBufferMode.Value);
if(enableLogicOp.HasValue && logicOp.HasValue)
{
gl.EnableIf(OpenGL.GL_COLOR_LOGIC_OP, enableLogicOp.Value);
gl.LogicOp(logicOp.Value);
}
if(colorModeClearColor != null) gl.ClearColor(colorModeClearColor.R, colorModeClearColor.G, colorModeClearColor.B, colorModeClearColor.A);
//todowritemask
}
//private PostProcesser _postProcesser;
public OpenGLStaticRenderer(int width, int height)
{
Width = width;
Height = height;
Text = "";
lock (gl)
{
// Create OpenGL.
gl.Create(OpenGLVersion.OpenGL2_1, RenderContextType.FBO, Width, Height, 32, null);
gl.MakeCurrent();
gl.Enable(OpenGL.GL_TEXTURE_2D);
gl.Enable(OpenGL.GL_CULL_FACE);
gl.Enable(OpenGL.GL_DEPTH_TEST);
gl.Enable(OpenGL.GL_BLEND);
gl.Enable(OpenGL.GL_VERTEX_ARRAY);
gl.Hint(HintTarget.LineSmooth, HintMode.Nicest);
gl.Enable(OpenGL.GL_LINE_SMOOTH);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(BlendingSourceFactor.SourceAlpha, BlendingDestinationFactor.OneMinusSourceAlpha);
gl.Enable(OpenGL.GL_MULTISAMPLE);
gl.MinSampleShading(4.0f);
gl.PolygonMode(FaceMode.FrontAndBack, PolygonMode.Filled);
//_postProcesser = new PostProcesser(gl, width, height);
//var t = new ShaderBindable(gl, "Shaders/Background.vert", "Shaders/Background.frag");
}
}
private void SharpGL_Render(object o, RenderEventArgs e)
{
TheOpenGL = this.ViewPort.OpenGL;
// Clear The Screen And The Depth Buffer
TheOpenGL.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
// Reset The View
TheOpenGL.LoadIdentity();
// Re-Enable texture.
TheOpenGL.Enable(OpenGL.GL_TEXTURE_2D);
// Enable blend function.
TheOpenGL.Enable(OpenGL.GL_BLEND);
TheOpenGL.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
TheOpenGL.MatrixMode(SharpGL.Enumerations.MatrixMode.Modelview);
TheOpenGL.Translate(Translation[0], Translation[1], Translation[2]);
TheOpenGL.Rotate(Rotation[0], 1, 0, 0);
TheOpenGL.Rotate(Rotation[1], 0, 1, 0);
TheOpenGL.Rotate(Rotation[2], 0, 0, 1);
// ########################################################################################
// ########################################################################################
DrawBackground();
DrawActors();
DrawForeground();
// ########################################################################################
// ########################################################################################
TheOpenGL.Flush();
}
private void RenderColor(OpenGL gl)
{
//Set Background Color
gl.ClearColor(0.0f, 0.0f, 0.0f, 1.0f);
gl.Enable(OpenGL.GL_DEPTH_TEST);
gl.Enable(OpenGL.GL_LIGHTING);
gl.Enable(OpenGL.GL_LIGHT0);
float[] global_ambient = new float[] { 1.0f, 1.0f, 1.0f, 1.0f };
float[] light0pos = new float[] { 50.0f, 10.0f, 6.0f, 1.0f };
float[] light0ambient = new float[] { 1.0f, 1.0f, 1.0f, 0.5f };
float[] light0diffuse = new float[] { 1.0f, 1.0f, 1.0f, 1.0f };
float[] light0specular = new float[] { 0.0f, 0.0f, 1.0f, 1.0f };
float[] lmodel_ambient = new float[] { 1.2f, 1.2f, 1.2f, 1.0f };
gl.LightModel(OpenGL.GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
gl.LightModel(OpenGL.GL_LIGHT_MODEL_AMBIENT, global_ambient);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_POSITION, light0pos);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_AMBIENT, light0ambient);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_DIFFUSE, light0diffuse);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_SPECULAR, light0specular);
gl.ColorMaterial(OpenGL.GL_FRONT_AND_BACK, OpenGL.GL_AMBIENT_AND_DIFFUSE);
gl.Enable(OpenGL.GL_COLOR_MATERIAL);
gl.ShadeModel(OpenGL.GL_SMOOTH);
gl.Enable(OpenGL.GL_LINE_SMOOTH);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
gl.Enable(OpenGL.GL_BLEND);
}
public static void DrawAxis(OpenGL gl, Vector3 position, Vector3 forward, Vector3 up, double scale)
{
gl.PushAttrib(OpenGL.GL_ENABLE_BIT);
gl.Disable(OpenGL.GL_LIGHTING);
gl.Disable(OpenGL.GL_TEXTURE_2D);
gl.Enable(OpenGL.GL_COLOR_MATERIAL);
gl.Enable(OpenGL.GL_BLEND);
gl.ColorMaterial(OpenGL.GL_FRONT_AND_BACK, OpenGL.GL_AMBIENT_AND_DIFFUSE);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
Vector3 side = forward.Cross(up);
gl.Begin(OpenGL.GL_LINES);
gl.Color(1.0, 0.0, 0.0, 1.0);
gl.Vertex(position.x, position.y, position.z);
gl.Vertex(position.x + side.x * scale, position.y + side.y * scale, position.z + side.z * scale);
gl.Color(0.0, 1.0, 0.0, 1.0);
gl.Vertex(position.x, position.y, position.z);
gl.Vertex(position.x + up.x * scale, position.y + up.y * scale, position.z + up.z * scale);
gl.Color(0.0, 0.0, 1.0, 1.0);
gl.Vertex(position.x, position.y, position.z);
gl.Vertex(position.x + forward.x * scale, position.y + forward.y * scale, position.z + forward.z * scale);
gl.End();
gl.PopAttrib();
}
public void Begin()
{
if (IsDisposed)
{
throw new ObjectDisposedException(nameof(SpriteBatch));
}
gl.Disable(GL_CULL_FACE);
gl.Enable(GL_DEPTH_TEST);
gl.Enable(GL_BLEND);
gl.BlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
gl.BlendEquation(GL_FUNC_ADD_EXT);
_shaderProgram.Bind(gl);
gl.BindBuffer(GL_ARRAY_BUFFER, vertexBufferIds[0]);
gl.BindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBufferIds[0]);
gl.BindVertexArray(vaos[0]);
currTexture = white1x1Tex;
}
/// <summary>
/// Handles the OpenGLInitialized event of the OpenGLControl control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="args">The <see cref="SharpGL.SceneGraph.OpenGLEventArgs"/> instance containing the event data.</param>
private void OpenGLControl_OpenGLInitialized(object sender, EventArgs args)
{
gl = openGLControl.OpenGL;
gl.Enable(OpenGL.GL_DEPTH_TEST);
float[] global_ambient = new float[] { 0.15f, 0.15f, 0.15f, 1.0f };
gl.LightModel(OpenGL.GL_LIGHT_MODEL_AMBIENT, global_ambient);
float[] light0pos = new float[] { 0.0f, 0.0f, 1.0f, 0.0f };
float[] light0ambient = new float[] { 0.0f, 0.0f, 0.0f, 1.0f };
float[] light0diffuse = new float[] { 1.0f, 1.0f, 1.0f, 1.0f };
float[] light0specular = new float[] { 0.0f, 0.0f, 0.0f, 0.0f };
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_POSITION, light0pos);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_AMBIENT, light0ambient);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_DIFFUSE, light0diffuse);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_SPECULAR, light0specular);
gl.Enable(OpenGL.GL_LIGHTING);
gl.Enable(OpenGL.GL_LIGHT0);
gl.Enable(OpenGL.GL_NORMALIZE);
gl.ShadeModel(OpenGL.GL_SMOOTH);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
gl.Enable(OpenGL.GL_BLEND);
}
private void InitializeOpenGL()
{
_openGL = new OpenGL();
_openGL.Create(OpenGLVersion.OpenGL2_1, RenderContextType.FBO, Canvas.Width, Canvas.Height, 32, Canvas.Sketch.Container.WindowHandle);
_openGL.ShadeModel(OpenGL.GL_SMOOTH);
_openGL.ClearColor(1.0f, 0.0f, 0.0f, 1.0f);
_openGL.ClearDepth(1.0f);
_openGL.Enable(OpenGL.GL_DEPTH_TEST);
_openGL.DepthFunc(OpenGL.GL_LEQUAL);
_openGL.Hint(OpenGL.GL_PERSPECTIVE_CORRECTION_HINT, OpenGL.GL_NICEST);
_openGL.Enable(OpenGL.GL_BLEND);
_openGL.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
_openGL.Enable(OpenGL.GL_LINE_SMOOTH);
_openGL.Hint(OpenGL.GL_LINE_SMOOTH_HINT, OpenGL.GL_NICEST);
defCameraFOV = 60f;
defCameraX = Canvas.Width / 2f;
defCameraY = Canvas.Height / 2f;
defCameraZ = defCameraY / ((float)Math.Tan((defCameraFOV / 360f * Constants.TWO_PI) / 2f));
defCameraNear = defCameraZ / 10f;
defCameraFar = defCameraZ * 10f;
defCameraAspect = (float)Canvas.Width / (float)Canvas.Height;
SetPerspective();
}
private void OpenGLControl_OpenGLInitialized(object sender, SharpGL.SceneGraph.OpenGLEventArgs args)
{
OpenGL gl = args.OpenGL;
//gl.ClearColor(0.7f, 0.7f, 0.9f, 0.0f); //Set Background Color
gl.Enable(OpenGL.GL_DEPTH_TEST);
float[] global_ambient = new float[] { 0.5f, 0.5f, 0.5f, 1.0f };
float[] light0pos = new float[] { 1.0f, 1.0f, 1.0f, 0.0f };
float[] light0ambient = new float[] { 0.0f, 0.0f, 0.0f, 1.0f };
float[] light0diffuse = new float[] { 1.0f, 1.0f, 1.0f, 1.0f };
float[] light0specular = new float[] { 1.0f, 1.0f, 1.0f, 1.0f };
float[] lmodel_ambient = new float[] { 1.2f, 1.2f, 1.2f, 1.0f };
gl.LightModel(OpenGL.GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
gl.LightModel(OpenGL.GL_LIGHT_MODEL_AMBIENT, global_ambient);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_POSITION, light0pos);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_AMBIENT, light0ambient);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_DIFFUSE, light0diffuse);
gl.Light(OpenGL.GL_LIGHT0, OpenGL.GL_SPECULAR, light0specular);
gl.Enable(OpenGL.GL_LIGHTING);
gl.Enable(OpenGL.GL_LIGHT0);
gl.ColorMaterial(OpenGL.GL_FRONT_AND_BACK, OpenGL.GL_AMBIENT_AND_DIFFUSE);
gl.Enable(OpenGL.GL_COLOR_MATERIAL);
gl.ShadeModel(OpenGL.GL_SMOOTH);
gl.Enable(OpenGL.GL_LINE_SMOOTH);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
gl.Enable(OpenGL.GL_BLEND);
}
public void Draw(OpenGL gl, float originX, float originY, float originZ, vec3 leftColor, vec3 rightColor, float audioModifier)
{
float scaleModifier = audioModifier * 1.6f;
if (scaleModifier < MinSize)
{
scaleModifier = MinSize;
}
for (int index = 0; index < _quad.VertexData.Length / _quad.DataStride; index++)
{
_quad.VertexData[index * _quad.DataStride + 3] = Constants.Colors[6, 0]; // r
_quad.VertexData[index * _quad.DataStride + 4] = Constants.Colors[6, 1]; // g
_quad.VertexData[index * _quad.DataStride + 5] = Constants.Colors[6, 2]; // b
_quad.VertexData[index * _quad.DataStride + 6] = 1.0f; // a
}
// Begin Draw
GlState.Instance.ModelMatrix = glm.translate(GlState.Instance.ModelMatrix, new vec3(originX, originY, originZ));
GlState.Instance.ModelMatrix = glm.scale(GlState.Instance.ModelMatrix, new vec3(scaleModifier, scaleModifier, scaleModifier));
// Update buffers
gl.BindBuffer(OpenGL.GL_ARRAY_BUFFER, _vertexBufferObject[0]);
GlBuffer.SetArrayData(gl, _quad.VertexData, _quad.SizeOfVertexDataBytes, OpenGL.GL_STATIC_DRAW);
// Make model matrix available for drawing
gl.UniformMatrix4(GlState.Instance.DefaultTexturedModelMatrixLocation, 1, false, GlState.Instance.ModelMatrix.to_array());
// Set blending for particle system
gl.BlendFunc(OpenGL.GL_ONE, OpenGL.GL_ONE);
gl.DepthFunc(OpenGL.GL_ALWAYS);
// Draw
gl.ActiveTexture(OpenGL.GL_TEXTURE0);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, _texture);
gl.BindVertexArray(_vertexArrayObject[0]);
gl.DrawElements(OpenGL.GL_TRIANGLES, _quad.IndexData.Length, _quad.IndexData);
gl.BindVertexArray(0);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);
// Reset depth and blend func
gl.DepthFunc(OpenGL.GL_LESS);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
GlState.Instance.ModelMatrix = mat4.identity();
// End Draw
}
public void OnInitialized()
{
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
// Set the clear color.
gl.ClearColor(0.9f, 0.9f, 0.9f, 0f);
}
private void openGLControl1_OpenGLInitialized(object sender, EventArgs e)
{
OpenGL gl = this.openGLControl1.OpenGL;
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
gl.ClearColor(0, 0, 0, 0);
}
public void InitOpenGL(OpenGL openGL)
{
// Set the clear color.
_gl.ClearColor(0, 0, 0, 0);
_gl.Enable(OpenGL.GL_BLEND);
_gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
}
/// <summary>
/// Affichage des flocons
/// </summary>
/// <param name="g"></param>
/// <param name="maintenant"></param>
/// <param name="tailleEcran"></param>
/// <param name="couleur"></param>
public override void AfficheOpenGL(OpenGL gl, Temps maintenant, Rectangle tailleEcran, Color couleur)
{
#if TRACER
RenderStart(CHRONO_TYPE.RENDER);
#endif
float[] col = { couleur.R / 255.0f, couleur.G / 255.0f, couleur.B / 255.0f, ALPHA_CENTRE };
GLfloat[] fogcolor = { couleur.R / 4096.0f, couleur.G / 4096.0f, couleur.B / 4096.0f, 0.5f };
gl.ClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
gl.Enable(OpenGL.GL_FOG);
gl.Fog(OpenGL.GL_FOG_MODE, OpenGL.GL_LINEAR);
gl.Fog(OpenGL.GL_FOG_COLOR, fogcolor);
gl.Fog(OpenGL.GL_FOG_DENSITY, 0.05f);
gl.Fog(OpenGL.GL_FOG_START, _tailleCubeZ * 3);
gl.Fog(OpenGL.GL_FOG_END, _tailleCubeZ * 60);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MAG_FILTER, OpenGL.GL_NEAREST);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MIN_FILTER, OpenGL.GL_NEAREST);
gl.LoadIdentity();
gl.Translate(0, 0, -_zCamera);
gl.Disable(OpenGL.GL_LIGHTING);
gl.Disable(OpenGL.GL_DEPTH);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
gl.Enable(OpenGL.GL_TEXTURE_2D);
gl.Color(col);
int derniereTexture = -1;
foreach (Flocon o in _flocons)
{
if (derniereTexture != o.type)
{
texture[o.type].Bind(gl);
derniereTexture = o.type;
}
gl.PushMatrix();
gl.Translate(o.x, o.y, o.z);
gl.Rotate(o.ax, o.ay, o.az);
gl.Begin(OpenGL.GL_QUADS);
{
gl.TexCoord(0.0f, 0.0f); gl.Vertex(-TAILLE_FLOCON, -TAILLE_FLOCON, 0);
gl.TexCoord(0.0f, 1.0f); gl.Vertex(-TAILLE_FLOCON, TAILLE_FLOCON, 0);
gl.TexCoord(1.0f, 1.0f); gl.Vertex(TAILLE_FLOCON, TAILLE_FLOCON, 0);
gl.TexCoord(1.0f, 0.0f); gl.Vertex(TAILLE_FLOCON, -TAILLE_FLOCON, 0);
}
gl.End();
gl.PopMatrix();
}
#if TRACER
RenderStop(CHRONO_TYPE.RENDER);
#endif
}
private void OpenGLControl_OpenGLInitialized(object sender, OpenGLEventArgs args)
{
gl = args.OpenGL;
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
gl.Enable(OpenGL.GL_POINT_SMOOTH);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
args.OpenGL.PointSize(6.0f);
args.OpenGL.LineWidth(1.0f);
}
private void Form1_Load(object sender, EventArgs e)
{
// Get the OpenGL object.
OpenGL gl = AnT.OpenGL;
// Clear the color and depth buffer.
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
gl.Viewport(0, 0, AnT.Size.Width, AnT.Size.Height);
gl.MatrixMode(OpenGL.GL_PROJECTION);
// Load the identity matrix.
gl.LoadIdentity();
//gl.Ortho(-AnT.Size.Width/2.0f, AnT.Size.Width / 2.0f, -AnT.Size.Height / 2.0f, AnT.Size.Height / 2.0f, 0.0f, 1.0f);
//gl.Ortho(-10, 10, -10, 10, -10, 10);
// размер проекции в зависимости от размеров AnT
if ((float)AnT.Size.Width <= (float)AnT.Size.Height)
{
ScreenW = size_p;
ScreenH = size_p * (float)AnT.Size.Height / (float)AnT.Size.Width;
//gl.Ortho2D(0.0, ScreenW, 0.0, ScreenH);
}
else
{
ScreenW = size_p * (float)AnT.Size.Width / (float)AnT.Size.Width;
ScreenH = size_p;
//gl.Ortho2D(0.0, ScreenW, 0.0, ScreenH);
}
gl.Ortho2D(-ScreenW, ScreenW, -ScreenH, ScreenH);
// коэффициенты для перевода координат оконной системы в систему OpenGL
devX = (float)(ScreenW * 2.0f) / (float)AnT.Size.Width;
devY = (float)(ScreenH * 2.0f) / (float)AnT.Size.Height;
// установка объектно-видовой матрицы
gl.MatrixMode(OpenGL.GL_MODELVIEW);
gl.Enable(OpenGL.GL_BLEND);
//gl.BlendEquationEXT(OpenGL.GL_FUNC_ADD_EXT);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
//gl.BlendFunc(OpenGL.GL_DST_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
//gl.BlendFunc(OpenGL.GL_ONE, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
//gl.BlendFunc(OpenGL.GL_ZERO, OpenGL.GL_ONE_MINUS_CONSTANT_ALPHA_EXT);
//gl.Enable(OpenGL.GL_POINT_SMOOTH);
gl.Disable(OpenGL.GL_DEPTH_TEST);
//gl.BlendColor(0.1f, 0.1f, 0.1f, 0.0f);
// gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE);
gl.LoadIdentity();
// старт счетчика таймера
PointInGrap.Start();
}
private void openGLControl_SizeChanged(object sender, EventArgs e)
{
//opengl setting
OpenGL gl = openGLControl.OpenGL;
gl.Enable(OpenGL.GL_LIGHTING);
gl.Enable(OpenGL.GL_LIGHT0);
gl.ShadeModel(OpenGL.GL_SMOOTH);
gl.Enable(OpenGL.GL_COLOR_MATERIAL);
gl.MatrixMode(OpenGL.GL_PROJECTION);
gl.LoadIdentity();
gl.MatrixMode(OpenGL.GL_MODELVIEW);
gl.Enable(OpenGL.GL_TEXTURE_2D);
gl.Disable(OpenGL.GL_DEPTH_TEST);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE);
double dHeight = (double)this.Size.Height;
double dWidth = (double)this.Size.Width;
double dMainRatio = dHeight / dWidth;
double dGLRatio = (((m_dY02 - m_dY01)) / ((m_dX02 - m_dX01)));
double dRatio = 0.0;
gl.Viewport(0, 0, (int)dWidth, (int)dHeight);
gl.MatrixMode(OpenGL.GL_PROJECTION);
gl.LoadIdentity();
m_ResultdX01 = m_dX01;
m_ResultdX02 = m_dX02;
m_ResultdY01 = m_dY01;
m_ResultdY02 = m_dY02;
if (dGLRatio > dMainRatio)
{
dRatio = ((m_dY02 - m_dY01)) / dHeight;
m_ResultdX01 = (((m_dX02 + m_dX01) - (dRatio * dWidth)) * 0.5);
m_ResultdX02 = (((m_dX02 + m_dX01) + (dRatio * dWidth)) * 0.5);
gl.Ortho(m_ResultdX01, m_ResultdX02, m_ResultdY01, m_ResultdY02, -1, 1);
}
else
{
dRatio = ((m_dX02 - m_dX01)) / dWidth;
m_ResultdY01 = ((m_dY02 + m_dY01) + (dRatio * dHeight)) * 0.5;
m_ResultdY02 = ((m_dY02 + m_dY01) - (dRatio * dHeight)) * 0.5;
gl.Ortho(m_ResultdX01, m_ResultdX02, m_ResultdY01, m_ResultdY02, -1, 1);
}
gl.MatrixMode(OpenGL.GL_MODELVIEW);
gl.LoadIdentity();
}
/// <summary>
/// Called before any glyphs have been rendered.
/// </summary>
/// <param name="bounds">The bounds the text will be rendered at and at whats size.</param>
void IGlyphRenderer.BeginText(FontRectangle bounds)
{
// called before any thing else to provide access to the total required size to redner the text
_gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
_gl.Enable(OpenGL.GL_BLEND);
_gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);
Vector4 colorV = Color;
_gl.Color(colorV.X, colorV.Y, colorV.Z, colorV.W);
}
protected override void DoRender(RenderEventArgs arg)
{
float deltaTime = (float)random.NextDouble() * 5;
time += (float)random.NextDouble() * 5;
OpenGL.BindBuffer(BufferTarget.UniformBuffer, attractor_buffer[0]);
IntPtr attractors = OpenGL.MapBufferRange(BufferTarget.UniformBuffer,
0, 64 * Marshal.SizeOf(typeof(vec4)),
MapBufferRangeAccess.MapWriteBit | MapBufferRangeAccess.MapInvalidateBufferBit);
unsafe
{
var array = (vec4 *)attractors.ToPointer();
for (int i = 0; i < 64; i++)
{
array[i] = new vec4(
(float)(Math.Sin(time)) * 50.0f,
(float)(Math.Cos(time)) * 50.0f,
(float)(Math.Cos(time)) * (float)(Math.Sin(time)) * 5.0f,
ParticleSimulatorCompute.attractor_masses[i]);
}
}
OpenGL.UnmapBuffer(BufferTarget.UniformBuffer);
OpenGL.BindBuffer(BufferTarget.UniformBuffer, 0);
// Activate the compute program and bind the position and velocity buffers
computeProgram.Bind();
OpenGL.GetDelegateFor <OpenGL.glBindImageTexture>()(0, textureBufferVelocity[0], 0, false, 0, OpenGL.GL_READ_WRITE, OpenGL.GL_RGBA32F);
OpenGL.GetDelegateFor <OpenGL.glBindImageTexture>()(1, textureBufferPosition[0], 0, false, 0, OpenGL.GL_READ_WRITE, OpenGL.GL_RGBA32F);
// Set delta time
computeProgram.SetUniform("dt", deltaTime);
// Dispatch
OpenGL.GetDelegateFor <OpenGL.glDispatchCompute>()(ParticleSimulatorCompute.particleGroupCount, 1, 1);
OpenGL.GetDelegateFor <OpenGL.glMemoryBarrier>()(OpenGL.GL_SHADER_IMAGE_ACCESS_BARRIER_BIT);
// Clear, select the rendering program and draw a full screen quad
SwitchesOn();
visualProgram.Bind();
mat4 view = arg.Camera.GetViewMat4();
mat4 projection = arg.Camera.GetProjectionMat4();
visualProgram.SetUniformMatrix4("mvp", (projection * view).to_array());
OpenGL.GetDelegateFor <OpenGL.glBindVertexArray>()(render_vao[0]);
OpenGL.Enable(OpenGL.GL_BLEND);
OpenGL.BlendFunc(OpenGL.GL_ONE, OpenGL.GL_ONE);
// glPointSize(2.0f);
OpenGL.DrawArrays(DrawMode.Points, 0, ParticleSimulatorCompute.particleCount);
OpenGL.Disable(OpenGL.GL_BLEND);
SwitchesOff();
}
public override void AfficheOpenGL(OpenGL gl, Temps maintenant, Rectangle tailleEcran, Color couleur)
{
#if TRACER
RenderStart(CHRONO_TYPE.RENDER);
#endif
if (_bmp == null)
{
return;
}
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
gl.PushMatrix();
gl.MatrixMode(OpenGL.GL_PROJECTION);
gl.PushMatrix();
gl.LoadIdentity();
gl.Ortho2D(0.0, 1.0, 0.0, 1.0);
gl.MatrixMode(OpenGL.GL_MODELVIEW);
gl.Disable(OpenGL.GL_LIGHTING);
gl.Disable(OpenGL.GL_DEPTH);
gl.Enable(OpenGL.GL_TEXTURE_2D);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
updatePalette(couleur);
float[] col = { couleur.R / 512.0f, couleur.G / 512.0f, couleur.B / 512.0f, 1 };
gl.Color(col);
Texture text = new Texture();
text.Create(gl, _bmp);
text.Bind(gl);
gl.Begin(OpenGL.GL_QUADS);
gl.TexCoord(0.0f, 0.0f); gl.Vertex(0, 1);
gl.TexCoord(0.0f, 1.0f); gl.Vertex(0, 0);
gl.TexCoord(1.0f, 1.0f); gl.Vertex(1, 0);
gl.TexCoord(1.0f, 0.0f); gl.Vertex(1, 1);
gl.End();
uint[] textures = { text.TextureName };
gl.DeleteTextures(1, textures);
text.Destroy(gl);
gl.MatrixMode(OpenGL.GL_PROJECTION);
gl.PopMatrix();
gl.MatrixMode(OpenGL.GL_MODELVIEW);
gl.PopMatrix();
#if TRACER
RenderStop(CHRONO_TYPE.RENDER);
#endif
}
private void initGL(OpenGL gl)
{
// Clear the color and depth buffers.
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
// Reset the modelview.
gl.LoadIdentity();
gl.LookAt(-20, 20, 40, 0, 0, 0, 0, 1, 0);
// Move into a more central position.
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
}
/// <summary>
/// Initialises the supplied OpenGL instance for high quality rendering.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
public static void InitialiseHighQuality(OpenGL gl)
{
// Set parameters that give us some high quality settings.
gl.Enable(OpenGL.GL_DEPTH_TEST);
gl.Enable(OpenGL.GL_NORMALIZE);
gl.Enable(OpenGL.GL_LIGHTING);
gl.Enable(OpenGL.GL_TEXTURE_2D);
gl.ShadeModel(OpenGL.GL_SMOOTH);
gl.LightModel(OpenGL.GL_LIGHT_MODEL_TWO_SIDE, OpenGL.GL_TRUE);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
}
/// <summary>
/// Initialises the supplied OpenGL instance for high quality rendering.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
public static void InitialiseHighQuality(OpenGL gl)
{
// Set parameters that give us some high quality settings.
gl.Enable(OpenGL.GL_DEPTH_TEST);
gl.Enable(OpenGL.GL_NORMALIZE);
gl.Enable(OpenGL.GL_LIGHTING);
gl.Enable(OpenGL.GL_TEXTURE_2D);
gl.ShadeModel(OpenGL.GL_SMOOTH);
gl.LightModel(OpenGL.GL_LIGHT_MODEL_TWO_SIDE, OpenGL.GL_TRUE);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
}
/// <summary>
/// Casts a real time 3D shadow.
/// </summary>
/// <param name="gl">The OpenGL object.</param>
/// <param name="light">The source light.</param>
public void CastShadow(OpenGL gl, Collections.LightCollection lights)
{
// Set the connectivity, (calculate the neighbours of each face).
SetConnectivity();
// Go through every light in the scene.
foreach(Lights.Light light in lights)
{
// Skip null lights.
if(light == null)
continue;
// Skip turned off lights and non shadow lights.
if(light.On == false || light.CastShadow == false)
continue;
// Every face will have a visibility setting.
bool[] facesVisible = new bool[faces.Count];
// Get the light position relative to the polygon.
Vertex lightPos = light.Translate;
lightPos = lightPos - Translate;
// Go through every face, finding out whether it's visible to the light.
for(int nFace = 0; nFace < faces.Count; nFace++)
{
// Get a reference to the face.
Face face = faces[nFace];
// Is this face facing the light?
float[] planeEquation = face.GetPlaneEquation(this);
float side = planeEquation[0] * lightPos.X +
planeEquation[1] * lightPos.Y +
planeEquation[2] * lightPos.Z + planeEquation[3];
facesVisible[nFace] = (side > 0) ? true : false;
}
// Save all the attributes.
gl.PushAttrib(OpenGL.ALL_ATTRIB_BITS);
// Turn off lighting.
gl.Disable(OpenGL.LIGHTING);
// Turn off writing to the depth mask.
gl.DepthMask(0);
gl.DepthFunc(OpenGL.LEQUAL);
// Turn on stencil buffer testing.
gl.Enable(OpenGL.STENCIL_TEST);
// Translate our shadow volumes.
gl.PushMatrix();
Transform(gl);
// Don't draw to the color buffer.
gl.ColorMask(0, 0, 0, 0);
gl.StencilFunc(OpenGL.ALWAYS, 1, 0xFFFFFFFF);
gl.Enable(OpenGL.CULL_FACE);
// First Pass. Increase Stencil Value In The Shadow
gl.FrontFace(OpenGL.CCW);
gl.StencilOp(OpenGL.KEEP, OpenGL.KEEP, OpenGL.INCR);
DoShadowPass(gl, lightPos, facesVisible);
// Second Pass. Decrease Stencil Value In The Shadow
gl.FrontFace(OpenGL.CW);
gl.StencilOp(OpenGL.KEEP, OpenGL.KEEP, OpenGL.DECR);
DoShadowPass(gl, lightPos, facesVisible);
gl.FrontFace(OpenGL.CCW);
gl.PopMatrix();
// Enable writing to the color buffer.
gl.ColorMask(1, 1, 1, 1);
// Draw A Shadowing Rectangle Covering The Entire Screen
gl.Color(light.ShadowColor);
gl.Enable(OpenGL.BLEND);
gl.BlendFunc(OpenGL.SRC_ALPHA, OpenGL.ONE_MINUS_SRC_ALPHA);
gl.StencilFunc(OpenGL.NOTEQUAL, 0, 0xFFFFFFF);
gl.StencilOp(OpenGL.KEEP, OpenGL.KEEP, OpenGL.KEEP);
Quadrics.Sphere shadow = new Quadrics.Sphere();
shadow.Scale.Set(shadowSize, shadowSize, shadowSize);
shadow.Draw(gl);
gl.PopAttrib();
}
}
public virtual void DrawGrid(OpenGL gl)
{
gl.PushAttrib(OpenGL.LINE_BIT | OpenGL.ENABLE_BIT | OpenGL.COLOR_BUFFER_BIT);
// Turn off lighting, set up some nice anti-aliasing for lines.
gl.Disable(OpenGL.LIGHTING);
gl.Hint(OpenGL.LINE_SMOOTH_HINT, OpenGL.NICEST);
gl.Enable(OpenGL.LINE_SMOOTH);
gl.Enable(OpenGL.BLEND);
gl.BlendFunc(OpenGL.SRC_ALPHA, OpenGL.ONE_MINUS_SRC_ALPHA);
// Create the grid.
gl.LineWidth(1.5f);
gl.Begin(OpenGL.LINES);
for (int i = -10; i <= 10; i++)
{
gl.Color(0.2f, 0.2f, 0.2f, 1f);
gl.Vertex(i, 0, -10);
gl.Vertex(i, 0, 10);
gl.Vertex(-10, 0, i);
gl.Vertex(10, 0, i);
}
gl.End();
// Turn off the depth test for the axies.
gl.Disable(OpenGL.DEPTH_TEST);
gl.LineWidth(2.0f);
// Create the axies.
gl.Begin(OpenGL.LINES);
gl.Color(1f, 0f, 0f, 1f);
gl.Vertex(0f, 0f, 0f);
gl.Vertex(3f, 0f, 0f);
gl.Color(0f, 1f, 0f, 1f);
gl.Vertex(0f, 0f, 0f);
gl.Vertex(0f, 3f, 0f);
gl.Color(0f, 0f, 1f, 1f);
gl.Vertex(0f, 0f, 0f);
gl.Vertex(0f, 0f, 3f);
gl.End();
gl.PopAttrib();
// gl.Flush();
}
/// <summary>
/// Casts a real time 3D shadow.
/// </summary>
/// <param name="gl">The OpenGL object.</param>
/// <param name="lights">The lights.</param>
private void CastShadow(OpenGL gl)
{
// Set the connectivity, (calculate the neighbours of each face).
SetConnectivity();
// Get the lights in the scene.
var lights = TraverseToRootElement().Traverse<Light>(l => l.IsEnabled && l.On && l.CastShadow);
// Get some useful references.
var faces = ParentPolygon.Faces;
// Go through every light in the scene.
foreach(var light in lights)
{
// Every face will have a visibility setting.
bool[] facesVisible = new bool[faces.Count];
// Get the light position relative to the polygon.
Vertex lightPos = light.Position;
lightPos = lightPos - ParentPolygon.Transformation.TranslationVertex;
// Go through every face, finding out whether it's visible to the light.
for(int nFace = 0; nFace < faces.Count; nFace++)
{
// Get a reference to the face.
Face face = faces[nFace];
// Is this face facing the light?
float[] planeEquation = face.GetPlaneEquation(ParentPolygon);
float side = planeEquation[0] * lightPos.X +
planeEquation[1] * lightPos.Y +
planeEquation[2] * lightPos.Z + planeEquation[3];
facesVisible[nFace] = (side > 0) ? true : false;
}
// Save all the attributes.
gl.PushAttrib(OpenGL.GL_ALL_ATTRIB_BITS);
// Turn off lighting.
gl.Disable(OpenGL.GL_LIGHTING);
// Turn off writing to the depth mask.
gl.DepthMask(0);
gl.DepthFunc(OpenGL.GL_LEQUAL);
// Turn on stencil buffer testing.
gl.Enable(OpenGL.GL_STENCIL_TEST);
// Translate our shadow volumes.
ParentPolygon.PushObjectSpace(gl);
// Don't draw to the color buffer.
gl.ColorMask(0, 0, 0, 0);
gl.StencilFunc(OpenGL.GL_ALWAYS, 1, 0xFFFFFFFF);
gl.Enable(OpenGL.GL_CULL_FACE);
// First Pass. Increase Stencil Value In The Shadow
gl.FrontFace(OpenGL.GL_CCW);
gl.StencilOp(OpenGL.GL_KEEP, OpenGL.GL_KEEP, OpenGL.GL_INCR);
DoShadowPass(gl, lightPos, facesVisible);
// Second Pass. Decrease Stencil Value In The Shadow
gl.FrontFace(OpenGL.GL_CW);
gl.StencilOp(OpenGL.GL_KEEP, OpenGL.GL_KEEP, OpenGL.GL_DECR);
DoShadowPass(gl, lightPos, facesVisible);
gl.FrontFace(OpenGL.GL_CCW);
ParentPolygon.PopObjectSpace(gl);
// Enable writing to the color buffer.
gl.ColorMask(1, 1, 1, 1);
// Draw A Shadowing Rectangle Covering The Entire Screen
gl.Color(light.ShadowColor);
gl.Enable(OpenGL.GL_BLEND);
gl.BlendFunc(OpenGL.GL_SRC_ALPHA, OpenGL.GL_ONE_MINUS_SRC_ALPHA);
gl.StencilFunc(OpenGL.GL_NOTEQUAL, 0, 0xFFFFFFF);
gl.StencilOp(OpenGL.GL_KEEP, OpenGL.GL_KEEP, OpenGL.GL_KEEP);
Quadrics.Sphere shadow = new Quadrics.Sphere();
shadow.Transformation.ScaleX = shadowSize;
shadow.Transformation.ScaleY = shadowSize;
shadow.Transformation.ScaleZ = shadowSize;
shadow.Render(gl, RenderMode.Design);
gl.PopAttrib();
}
}