/// <summary>
/// Draw this SceneGraph.
/// </summary>
/// <param name="ctx">
/// The <see cref="GraphicsContext"/> used for drawing.
/// </param>
/// <param name="programOverride">
/// A <see cref="ShaderProgram"/> that overrides the default one used for rendering the batch. It can be null.
/// </param>
public void Draw(GraphicsContext ctx, ShaderProgram programOverride)
{
CheckCurrentContext(ctx);
// View parameters
SceneRoot.LocalProjection = ProjectionMatrix;
SceneRoot.LocalModel = new ModelMatrix();
SceneRoot.LocalModelView = ViewMatrix;
SceneRoot.LocalModelViewProjection = new ModelMatrix((Matrix4x4)ProjectionMatrix.Multiply(ViewMatrix));
using (SceneGraphContext ctxScene = new SceneGraphContext(this)) {
ObjectBatchContext objectBatchContext = new ObjectBatchContext();
// Traverse the scene graph
SceneRoot.TraverseDirect(ctx, ctxScene, _TraverseDrawContext, objectBatchContext);
// Generate shadow maps
if ((SceneFlags & SceneGraphFlags.Lighting) != 0 && (SceneFlags & SceneGraphFlags.ShadowMaps) != 0)
{
_LightManager.GenerateShadowMaps(ctx, this);
}
// Sort geometries
List <SceneObjectBatch> sceneObjects = objectBatchContext.Objects;
if (((SceneFlags & SceneGraphFlags.StateSorting) != 0) && (_SorterRoot != null))
{
sceneObjects = _SorterRoot.Sort(objectBatchContext.Objects);
}
// Draw all batches
KhronosApi.LogComment("*** Draw Graph");
foreach (SceneObjectBatch objectBatch in sceneObjects)
{
objectBatch.Draw(ctx, programOverride);
}
// Debug: shadow maps
if ((SceneFlags & SceneGraphFlags.Lighting) != 0 && (SceneFlags & SceneGraphFlags.ShadowMaps) != 0)
{
DisplayShadowMaps(ctx);
}
}
}
/// <summary>
/// Update framebuffer.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ObjectsControl_Render(object sender, GlControlEventArgs e)
{
GlControl senderControl = (GlControl)sender;
float senderAspectRatio = (float)senderControl.Width / senderControl.Height;
KhronosApi.LogEnabled = false;
KhronosApi.LogComment("--------------------------------------------------");
KhronosApi.LogComment("*** Draw");
// Clear
Gl.Viewport(0, 0, senderControl.Width, senderControl.Height);
Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
_CubeScene.CurrentView.ProjectionMatrix = new PerspectiveProjectionMatrix(45.0f, senderAspectRatio, 0.1f, 100.0f);
_CubeScene.CurrentView.LocalModel.SetIdentity();
_CubeScene.CurrentView.LocalModel.Translate(_ViewStrideLat, _ViewStrideAlt, 0.0f);
_CubeScene.CurrentView.LocalModel.RotateY(_ViewAzimuth);
_CubeScene.CurrentView.LocalModel.RotateX(_ViewElevation);
_CubeScene.CurrentView.LocalModel.Translate(0.0f, 0.0f, _ViewLever);
_CubeScene.UpdateViewMatrix();
_CubeScene.Draw(_Context);
KhronosApi.LogEnabled = false;
return;
// Overlay
ProjectionMatrix overlayProjection = new OrthoProjectionMatrix(0.0f, ClientSize.Width, 0.0f, ClientSize.Height);
ModelMatrix overlayModel = new ModelMatrix();
overlayModel.Translate(0.375f, 0.375f);
Gl.Clear(ClearBufferMask.DepthBufferBit);
ColorRGBAF fpsColor = ColorRGBAF.ColorGreen;
int fps = (int)Math.Floor(1000.0 / senderControl.FrameSwapTime.TotalMilliseconds);
if (fps >= 59)
{
fpsColor = ColorRGBAF.ColorGreen;
}
else if (fps >= 29)
{
fpsColor = ColorRGBAF.ColorBlue;
}
else if (fps >= 24)
{
fpsColor = ColorRGBAF.ColorYellow;
}
else
{
fpsColor = ColorRGBAF.ColorRed;
}
fontPatch.DrawString(
_Context, overlayProjection * overlayModel, fpsColor,
String.Format("FPS: {0}", fps)
);
overlayModel.SetIdentity();
overlayModel.Translate(0.375f, ClientSize.Height - 64 + 0.375f);
fontTitle.DrawString(
_Context, overlayProjection * overlayModel, ColorRGBAF.ColorGreen,
"Hello Objects example ~(^.^)~"
);
overlayModel.SetIdentity();
overlayModel.Translate(0.375f, ClientSize.Height - 128 + 0.375f);
fontTitleV.DrawString(_Context, overlayProjection * overlayModel, ColorRGBAF.ColorGreen,
"Hello Objects example ~(^.^)~"
);
// Release resources
_Context.DisposeResources();
}