// This method renders our scene.
// We could optimize it in any of several ways, including factoring out the repeated OpenGL initialization calls and
// hanging onto the GLU quadric object, but the details of how it's implemented aren't important here.
// The main thing to note is that we've factored the drawing code out of the NSView subclass so that
// the full-screen and non-fullscreen views share the same states for rendering
// (and MainController can use it when rendering in full-screen mode on pre-10.6 systems).
public void render ()
{
GL.Enable (EnableCap.DepthTest);
GL.Enable (EnableCap.CullFace);
GL.Enable (EnableCap.Lighting);
GL.Enable (EnableCap.Light0);
GL.Enable (EnableCap.Texture2D);
GL.ClearColor (0, 0, 0, 0);
GL.Clear (ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
// Upload the texture
// Since we are sharing OpenGL objects between the full-screen and non-fullscreen contexts, we only need to do this once
if (textureName == 0) {
var path = NSBundle.MainBundle.PathForResource ("Earth", "jpg");
texture = new Texture (path);
textureName = texture.TextureName;
}
// Set up texturing parameters
GL.BindTexture (TextureTarget.Texture2D, textureName);
GL.TexEnv (TextureEnvTarget.TextureEnv, TextureEnvParameter.TextureEnvMode, (float)All.Modulate);
lightDirection[0] = (float)Math.Cos (degreesToRadians (SunAngle));
lightDirection[2] = (float)Math.Sin (degreesToRadians (SunAngle));
GL.Light (LightName.Light0, LightParameter.Position, lightDirection);
GL.PushMatrix ();
// Back the camera off a bit
GL.Translate (0, 0, -1.5f);
// Draw the Earth!
if (wireFrame)
GL.PolygonMode (MaterialFace.FrontAndBack, PolygonMode.Line);
else
GL.PolygonMode (MaterialFace.FrontAndBack, PolygonMode.Fill);
GL.Material (MaterialFace.Front, MaterialParameter.Ambient, materialAmbient);
GL.Material (MaterialFace.Front, MaterialParameter.Diffuse, materialDiffuse);
GL.Rotate (RollAngle, 1, 0, 0);
// Earth's axial tilt is 23.45 degrees from the plane of the ecliptic
GL.Rotate (-23.45, 0, 0, 1);
GL.Rotate ((animationPhase * 360), 0, 1, 0);
GL.Rotate (-90, 1, 0, 0);
sphere.Draw ();
GL.PopMatrix ();
GL.BindTexture (TextureTarget.Texture2D, 0);
GL.Flush ();
}
// This method renders our scene.
// We could optimize it in any of several ways, including factoring out the repeated OpenGL initialization calls and
// hanging onto the GLU quadric object, but the details of how it's implemented aren't important here.
// The main thing to note is that we've factored the drawing code out of the NSView subclass so that
// the full-screen and non-fullscreen views share the same states for rendering
// (and MainController can use it when rendering in full-screen mode on pre-10.6 systems).
public void Render()
{
IntPtr quadric = IntPtr.Zero;
GL.glEnable (GL.GL_DEPTH_TEST);
GL.glEnable (GL.GL_CULL_FACE);
GL.glEnable (GL.GL_LIGHTING);
GL.glEnable (GL.GL_LIGHT0);
GL.glEnable (GL.GL_TEXTURE_2D);
GL.glClearColor (0, 0, 0, 0);
GL.glClear (GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
// Upload the texture
// Since we are sharing OpenGL objects between the full-screen and non-fullscreen contexts, we only need to do this once
if (this.texture == null) {
NSString path = NSBundle.MainBundle.PathForResourceOfType ("Earth", "jpg");
this.texture = new Texture (path);
this.textureName = this.texture.TextureName;
}
// Set up texturing parameters
GL.glBindTexture (GL.GL_TEXTURE_2D, this.textureName);
GL.glTexEnvf (GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_MODULATE);
// Set up our single directional light (the Sun!)
lightDirection[0] = (float)Math.Cos (sunAngle * Math.PI / 180.0);
lightDirection[2] = (float)Math.Sin (sunAngle * Math.PI / 180.0);
GL.glLightfv (GL.GL_LIGHT0, GL.GL_POSITION, lightDirection);
GL.glPushMatrix ();
// Back the camera off a bit
GL.glTranslatef (0.0f, 0.0f, -1.5f);
// Draw the Earth!
quadric = GL.gluNewQuadric ();
if (wireframe) {
GL.gluQuadricDrawStyle (quadric, GL.GLU_LINE);
}
GL.gluQuadricTexture (quadric, (byte)GL.GL_TRUE);
GL.glMaterialfv (GL.GL_FRONT, GL.GL_AMBIENT, materialAmbient);
GL.glMaterialfv (GL.GL_FRONT, GL.GL_DIFFUSE, materialDiffuse);
GL.glRotatef (rollAngle, 1.0f, 0.0f, 0.0f);
GL.glRotatef (-23.45f, 0.0f, 0.0f, 1.0f);
// Earth's axial tilt is 23.45 degrees from the plane of the ecliptic
GL.glRotatef (animationPhase * 360.0f, 0.0f, 1.0f, 0.0f);
GL.glRotatef (-90.0f, 1.0f, 0.0f, 0.0f);
GL.gluSphere (quadric, radius, 48, 24);
GL.gluDeleteQuadric (quadric);
quadric = IntPtr.Zero;
GL.glPopMatrix ();
GL.glBindTexture (GL.GL_TEXTURE_2D, 0);
}
