public void TestPerspectiveFrustum()
{
PerspectiveProjectionMatrix projectionMatrix = new PerspectiveProjectionMatrix();
ModelMatrix modelMatrix = new ModelMatrix();
BoundingBox boundingBox;
Vertex3f bboxPosition;
projectionMatrix.SetPerspective(60.0f, 1.0f, 0.5f, 15.0f);
modelMatrix.Translate(new Vertex3f(-1000.0f, 00.0f, 0.0f));
IEnumerable <Plane> planes = Plane.GetFrustumPlanes(projectionMatrix * modelMatrix);
bboxPosition = new Vertex3f(-0.5f, -0.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsTrue(boundingBox.IsClipped(planes));
bboxPosition = new Vertex3f(-10.5f, -10.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsTrue(boundingBox.IsClipped(planes));
bboxPosition = new Vertex3f(999.5f, -0.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsFalse(boundingBox.IsClipped(planes));
modelMatrix.SetIdentity();
modelMatrix.RotateY(180.0f);
planes = Plane.GetFrustumPlanes(projectionMatrix * modelMatrix);
bboxPosition = new Vertex3f(-10.5f, -10.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsTrue(boundingBox.IsClipped(planes));
bboxPosition = new Vertex3f(999.5f, -0.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsTrue(boundingBox.IsClipped(planes));
bboxPosition = new Vertex3f(-0.5f, -0.5f, +3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsFalse(boundingBox.IsClipped(planes));
}
/// <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;
// Clear
Gl.Viewport(0, 0, senderControl.Width, senderControl.Height);
Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
_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.CurrentView.ProjectionMatrix = new PerspectiveProjectionMatrix(45.0f, senderAspectRatio, 0.5f, 10000.0f);
_CubeScene.Draw(_Context);
// 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 = senderControl.Fps;
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}", senderControl.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 ~(^.^)~"
);
}
/// <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();
}