public void ClearDepthBuffer()
{
using (ScopedLock lLock = LockContext())
{
Gl.glClear(Gl.GL_DEPTH_BUFFER_BIT);
}
}
public void PopTransform()
{
using (ScopedLock lLock = LockContext())
{
Gl.glPopMatrix();
}
}
protected void SetViewPort(int xiWidth, int xiHeight)
{
using (ScopedLock lLock = LockContext())
{
Gl.glViewport(0, 0, xiWidth, xiHeight);
}
}
public void DisableLighting()
{
using (ScopedLock lLock = LockContext())
{
Gl.glDisable(Gl.GL_LIGHTING);
Gl.glDisable(Gl.GL_COLOR_MATERIAL);
}
}
public void PushTransform(Matrix xiTransform)
{
using (ScopedLock lLock = LockContext())
{
Gl.glPushMatrix();
Gl.glMultMatrixd(xiTransform.ToArray());
}
}
public void EnableLighting()
{
using (ScopedLock lLock = LockContext())
{
Gl.glEnable(Gl.GL_LIGHTING);
Gl.glEnable(Gl.GL_COLOR_MATERIAL);
Gl.glColorMaterial(Gl.GL_FRONT_AND_BACK, Gl.GL_AMBIENT_AND_DIFFUSE);
}
}
public void Clear()
{
using (ScopedLock lLock = LockContext())
{
Gl.glClear(Gl.GL_COLOR_BUFFER_BIT | Gl.GL_DEPTH_BUFFER_BIT);
}
ResetCounters();
}
public int SetLight(int xiLightId, Light xiLight)
{
int lGLLightId = GetLightId(xiLightId);
using (ScopedLock lLock = LockContext())
{
Gl.glLightfv(
lGLLightId,
Gl.GL_POSITION,
new float[] {
(float)xiLight.Position.x,
(float)xiLight.Position.y,
(float)xiLight.Position.z,
1f
});
Gl.glLightfv(
lGLLightId,
Gl.GL_DIFFUSE,
new float[] {
(float)xiLight.DiffuseColor.R / 255,
(float)xiLight.DiffuseColor.G / 255,
(float)xiLight.DiffuseColor.B / 255,
(float)xiLight.DiffuseIntensity
});
Gl.glLightfv(
lGLLightId,
Gl.GL_AMBIENT,
new float[] {
(float)xiLight.AmbientColor.R / 255,
(float)xiLight.AmbientColor.G / 255,
(float)xiLight.AmbientColor.B / 255,
(float)xiLight.AmbientIntensity
});
Gl.glLightfv(
lGLLightId,
Gl.GL_SPECULAR,
new float[] {
(float)xiLight.SpecularColor.R / 255,
(float)xiLight.SpecularColor.G / 255,
(float)xiLight.SpecularColor.B / 255,
(float)xiLight.SpecularIntensity
});
Gl.glEnable(lGLLightId);
}
return(xiLightId);
}
protected virtual void Init()
{
using (ScopedLock lLock = LockContext())
{
Gl.glEnable(Gl.GL_TEXTURE_2D);
Gl.glShadeModel(Gl.GL_SMOOTH);
Gl.glClearColor(0, 0, 0, 0.5f);
Gl.glClearDepth(1);
Gl.glEnable(Gl.GL_DEPTH_TEST);
Gl.glDepthFunc(Gl.GL_LEQUAL);
Gl.glHint(Gl.GL_PERSPECTIVE_CORRECTION_HINT, Gl.GL_NICEST);
Gl.glColorMaterial(Gl.GL_FRONT_AND_BACK, Gl.GL_AMBIENT_AND_DIFFUSE);
}
}
public void ResetLights()
{
using (ScopedLock lLock = LockContext())
{
Gl.glDisable(Gl.GL_LIGHT0);
Gl.glDisable(Gl.GL_LIGHT1);
Gl.glDisable(Gl.GL_LIGHT2);
Gl.glDisable(Gl.GL_LIGHT3);
Gl.glDisable(Gl.GL_LIGHT4);
Gl.glDisable(Gl.GL_LIGHT5);
Gl.glDisable(Gl.GL_LIGHT6);
Gl.glDisable(Gl.GL_LIGHT7);
}
mNextLight = 0;
}
public void SetCamera(Camera xiCamera)
{
using (ScopedLock lLock = LockContext())
{
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glLoadIdentity();
int[] lViewPort = new int[4];
Gl.glGetIntegerv(Gl.GL_VIEWPORT, lViewPort);
if (mPickMode)
{
Glu.gluPickMatrix((double)mPickX, (double)(lViewPort[3] - mPickY), 1, 1, lViewPort);
}
switch (xiCamera.ProjectionMode)
{
case eProjectionMode.Perspective:
Glu.gluPerspective(
xiCamera.Fov,
(double)(lViewPort[0] - lViewPort[3]) / (double)(lViewPort[3] - lViewPort[1]),
xiCamera.NearClip,
xiCamera.FarClip);
break;
case eProjectionMode.Orthographic:
double lSize = xiCamera.Position.GetPositionVector() * xiCamera.ZAxis;
double lRatio = (double)lViewPort[3] / (double)lViewPort[2];
Gl.glOrtho(
-lSize / 2,
lSize / 2,
-lSize * lRatio / 2,
lSize * lRatio / 2,
xiCamera.NearClip,
xiCamera.FarClip);
break;
default:
throw new Exception("Unrecognised projection mode");
}
Gl.glMatrixMode(Gl.GL_MODELVIEW);
Gl.glLoadMatrixd(xiCamera.Transform.Inverse().ToArray());
}
}
public void Detach()
{
if (mRenderingContext != IntPtr.Zero)
{
try
{
using (ScopedLock lLock = ScopedLock.Lock(mRenderingContext))
{
if (Wgl.wglGetCurrentContext() == mRenderingContext)
{
if (!Wgl.wglMakeCurrent(IntPtr.Zero, IntPtr.Zero))
{
throw new Exception("Could not release rendering context");
}
}
lock (mRenderingContexts)
{
mRenderingContexts.Remove(mRenderingContext);
if (!Wgl.wglDeleteContext(mRenderingContext))
{
throw new Exception("Could not delete rendering context");
}
}
}
}
finally
{
try
{
if (mSurface != null)
{
mSurface.Resize -= Surface_Resize;
mSurface.ReleaseDeviceContext -= Surface_ReleaseDeviceContext;
mSurface.Paint -= Surface_Paint;
}
}
finally
{
mSurface = null;
mRenderingContext = IntPtr.Zero;
}
}
}
}
public void RenderMesh(Mesh xiMesh, RenderOptions xiOptions)
{
if (mPickMode)
{
using (ScopedLock lLock = LockContext())
{
Gl.glLoadName(mPickIndex);
}
mPickMeshes.Add(mPickIndex, xiMesh);
++mPickIndex;
}
DateTime lStart = DateTime.Now;
RenderMeshInternal(xiMesh, xiOptions);
mRenderTime += (DateTime.Now - lStart).Milliseconds;
++mMeshCount;
mVertexCount += xiMesh.Vertices.Count;
}
private static int LoadTexture(Bitmap xiTexture)
{
int lTextureId;
lock (mRenderingContexts)
{
if (mRenderingContexts.Count == 0)
{
throw new Exception("No rendering contexts exist");
}
Rectangle rectangle = new Rectangle(0, 0, xiTexture.Width, xiTexture.Height);
BitmapData lData = xiTexture.LockBits(
new Rectangle(0, 0, xiTexture.Width, xiTexture.Height),
ImageLockMode.ReadOnly,
PixelFormat.Format24bppRgb);
using (ScopedLock lLock = ScopedLock.Lock(mRenderingContexts[0]))
{
Gl.glGenTextures(1, out lTextureId);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, lTextureId);
Gl.glTexImage2D(
Gl.GL_TEXTURE_2D,
0,
Gl.GL_RGB8,
xiTexture.Width,
xiTexture.Height,
0,
Gl.GL_BGR,
Gl.GL_UNSIGNED_BYTE,
lData.Scan0);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_LINEAR);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_LINEAR);
}
xiTexture.UnlockBits(lData);
}
return(lTextureId);
}
protected ScopedLock LockContext()
{
ScopedLock lLock = ScopedLock.Lock(mRenderingContext);
try
{
if (Wgl.wglGetCurrentContext() != mRenderingContext)
{
if (!Wgl.wglMakeCurrent(mSurface.DeviceContext, mRenderingContext))
{
throw new Exception("Could not set the rendering context");
}
}
}
catch
{
lLock.Dispose();
throw;
}
return(lLock);
}
protected override void RenderMeshInternal(Mesh xiMesh, RenderOptions xiOptions)
{
using (ScopedLock lLock = LockContext())
{
RenderMode lMode = DefaultRenderMode;
if (FixedRenderMode != RenderMode.Undefined)
{
lMode = FixedRenderMode;
}
else if (xiMesh.RenderMode != RenderMode.Undefined)
{
lMode = xiMesh.RenderMode;
}
switch (lMode)
{
case RenderMode.Points:
Gl.glPolygonMode(Gl.GL_FRONT_AND_BACK, Gl.GL_POINT);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, 0);
break;
case RenderMode.Wireframe:
Gl.glPolygonMode(Gl.GL_FRONT_AND_BACK, Gl.GL_LINE);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, 0);
break;
case RenderMode.Filled:
case RenderMode.TranslucentFilled:
Gl.glPolygonMode(Gl.GL_FRONT_AND_BACK, Gl.GL_FILL);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, 0);
break;
default:
case RenderMode.Textured:
Gl.glPolygonMode(Gl.GL_FRONT_AND_BACK, Gl.GL_FILL);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, xiMesh.Texture);
break;
}
switch (xiMesh.PolygonMode)
{
case PolygonMode.Lines:
Gl.glBegin(Gl.GL_LINES);
break;
case PolygonMode.Triangles:
Gl.glBegin(Gl.GL_TRIANGLES);
break;
case PolygonMode.Quads:
Gl.glBegin(Gl.GL_QUADS);
break;
default:
throw new Exception("Unrecognised polygon type");
}
foreach (Vertex lVertex in xiMesh.Vertices)
{
if (lMode == RenderMode.TranslucentFilled)
{
Gl.glColor4d(
(double)lVertex.Color.R / 255,
(double)lVertex.Color.G / 255,
(double)lVertex.Color.B / 255,
(double)lVertex.Color.A / 255);
}
else
{
Gl.glColor3d(
(double)lVertex.Color.R / 255,
(double)lVertex.Color.G / 255,
(double)lVertex.Color.B / 255);
}
Gl.glNormal3d(lVertex.Normal.x, lVertex.Normal.y, lVertex.Normal.z);
Gl.glTexCoord2d(lVertex.TexCoordX, lVertex.TexCoordY);
Gl.glVertex3d(lVertex.Position.x, lVertex.Position.y, lVertex.Position.z);
}
Gl.glEnd();
if ((xiOptions & RenderOptions.ShowNormals) == RenderOptions.ShowNormals)
{
Gl.glBegin(Gl.GL_LINES);
Gl.glColor3d(0.0, 0.0, 1.0);
foreach (Vertex lVertex in xiMesh.Vertices)
{
Gl.glVertex3d(lVertex.Position.x, lVertex.Position.y, lVertex.Position.z);
Point lNormalEnd = lVertex.Position + 25 * lVertex.Normal;
Gl.glVertex3d(lNormalEnd.x, lNormalEnd.y, lNormalEnd.z);
}
Gl.glEnd();
}
}
}
public Mesh Pick(int x, int y)
{
using (ScopedLock lLock = LockContext())
{
int lPickIndex = int.MinValue;
try
{
mPickMode = true;
mPickX = x;
mPickY = y;
mPickMeshes.Clear();
mPickIndex = 0;
int[] lPickBuffer = new int[512];
Gl.glSelectBuffer(lPickBuffer.Length, lPickBuffer);
Gl.glRenderMode(Gl.GL_SELECT);
Gl.glInitNames();
Gl.glPushName(0);
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glPushMatrix();
Gl.glMatrixMode(Gl.GL_MODELVIEW);
if (NextFrame != null)
{
NextFrame(this, new NextFrameArgs(true));
}
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glPopMatrix();
Gl.glMatrixMode(Gl.GL_MODELVIEW);
int lHits = Gl.glRenderMode(Gl.GL_RENDER);
int lDepth = int.MaxValue;
for (int ii = 0; ii < lHits; ++ii)
{
if (lPickBuffer[ii * 4 + 1] < lDepth)
{
lDepth = lPickBuffer[ii * 4 + 1];
lPickIndex = lPickBuffer[ii * 4 + 3];
}
}
}
finally
{
mPickMode = false;
}
if (mPickMeshes.ContainsKey(lPickIndex))
{
return(mPickMeshes[lPickIndex]);
}
else
{
return(null);
}
}
}
