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hi
i wrote a program that uses texture1d as palette for my fractals. when i use the GL.Color4(), it show the desired image, but when i use texcoord1(), it just show a black screen. here is a snippet of code that show where my codes to draw to the window.
the bmp file that the loaded as a palette was called somewhere else. the textureid was past to this class by program.cs.
private void setColor(double c)
{
if (c >= 0.9)
GL.Color4(1.0, 0.0, 0.0, 1.0);
else if (c >= 0.8)
GL.Color4(0.0, 1.0, 1.0, 1.0);
else if (c >= 0.70)
GL.Color4(1.0, 1.0, 0.0, 1.0);
else if (c >= 0.50)
GL.Color4(1.0, 0.0, 1.0, 1.0);
else if (c >= 0.4)
GL.Color4(0.0, 0.0, 1.0, 1.0);
else if (c >= 0.30)
GL.Color4(0.0, 1.0, 0.0, 1.0);
else if (c >= 0.2)
GL.Color4(0.0, 0.0, 0.0, 1.0);
else
GL.Color4(1.0, 1.0, 1.0, 1.0);
}
private void plotDot(double x, double y, int c)
{
GL.Begin(BeginMode.Points);
GL.TexCoord1((double)c / (double)maxIter);
// setColor((double) c / (double) maxIter);
GL.Vertex2(cx(x), cy(y));
GL.End();
}
int compute(double x, double y)
{
if (func == function.julia)
return Julia(x, y);
return Mandelbrot(x, y);
}
public void display_fractal(int ID)
{
GL.Clear(ClearBufferMask.ColorBufferBit);
GL.ClearColor(Color4.Gold);
GL.Disable(EnableCap.Texture2D);
GL.Enable(EnableCap.Texture1D);
GL.BindTexture(TextureTarget.Texture1D, ID);
for (double y = b; y <= t; y += deltay)
{
for (double x = lMsX; x <= r + sX; x += deltax)
{
plotDot(x, y, compute(x, y));
}
}
GL.BindTexture(TextureTarget.Texture1D, 0);
GL.Disable(EnableCap.Texture1D);
}
