public SnowParticleSystem(int maxParticles,Vector3 origin, Vector3 size) :base (maxParticles, origin) {
height = size.Y;
width = size.X;
depth = size.Z;
texture = GL.GenTexture();
GL.BindTexture(TextureTarget.Texture2D, texture);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
Bitmap bmp = new Bitmap("Assets/snow.png");
BitmapData bmp_data = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, bmp_data.Width, bmp_data.Height, 0, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, bmp_data.Scan0);
bmp.UnlockBits(bmp_data);
bmp.Dispose();
}
public virtual void Render()
{
// Again, Vector3 and Matrix4 must be fully scoped, because
// the OpenTK namespace contains both classes already
Math_Implementation.Vector3 eyePos = new Math_Implementation.Vector3();
eyePos.X = _baseCameraAngle.Z * -(float)System.Math.Sin(_baseCameraAngle.X * _baseRads * (float)System.Math.Cos(_baseCameraAngle.Y * _baseRads));
eyePos.Y = _baseCameraAngle.Z * -(float)System.Math.Sin(_baseCameraAngle.Y * _baseRads);
eyePos.Z = -_baseCameraAngle.Z * (float)System.Math.Cos(_baseCameraAngle.X * _baseRads * (float)System.Math.Cos(_baseCameraAngle.Y * _baseRads));
Math_Implementation.Matrix4 lookAt =
Math_Implementation.Matrix4.LookAt(eyePos,
new Math_Implementation.Vector3(0.0f, 0.0f, 0.0f),
new Math_Implementation.Vector3(0.0f, 1.0f, 0.0f));
GL.LoadMatrix(Math_Implementation.Matrix4.Transpose(lookAt).Matrix);
}
