/// <summary>
/// Render to the provided instance of OpenGL.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
/// <param name="renderMode">The render mode.</param>
public override void Render(OpenGL gl, RenderMode renderMode)
{
// Create the evaluator.
gl.Map2(OpenGL.GL_MAP2_VERTEX_3, // Use and produce 3D points.
0, // Low order value of 'u'.
1, // High order value of 'u'.
3, // Size (bytes) of a control point.
ControlPoints.Width, // Order (i.e degree plus one).
0, // Low order value of 'v'.
1, // High order value of 'v'
ControlPoints.Width * 3, // Size in bytes of a 'row' of points.
ControlPoints.Height, // Order (i.e degree plus one).
ControlPoints.ToFloatArray()); // The control points.
gl.Enable(OpenGL.GL_MAP2_VERTEX_3);
gl.Enable(OpenGL.GL_AUTO_NORMAL);
gl.MapGrid2(20, 0, 1, 20, 0, 1);
// Now draw it.
gl.EvalMesh2(OpenGL.GL_FILL, 0, 20, 0, 20);
// Draw the control points.
ControlPoints.Draw(gl, DrawControlPoints, DrawControlGrid);
}
/// <summary>
/// Draws the specified gl.
/// </summary>
/// <param name="gl">The gl.</param>
/// <param name="grid">The grid.</param>
/// <param name="scale">The scale.</param>
/// <param name="type">The type.</param>
public void Draw(OpenGL gl, int grid, double scale, uint type)
{
float[, ,] p = new float[4, 4, 3];
float[, ,] q = new float[4, 4, 3];
float[, ,] r = new float[4, 4, 3];
float[, ,] s = new float[4, 4, 3];
gl.PushAttrib(OpenGL.GL_ENABLE_BIT | OpenGL.GL_EVAL_BIT);
gl.Enable(OpenGL.GL_AUTO_NORMAL);
gl.Enable(OpenGL.GL_NORMALIZE);
gl.Enable(OpenGL.GL_MAP2_VERTEX_3);
gl.Enable(OpenGL.GL_MAP2_TEXTURE_COORD_2);
gl.PushMatrix();
gl.Rotate(270.0f, 1.0f, 0.0f, 0.0f);
gl.Scale(0.5f * scale, 0.5f * scale, 0.5f * scale);
gl.Translate(0.0, 0.0, -1.5);
for (int i = 0; i < 10; i++)
{
for (int j = 0; j < 4; j++)
{
for (int k = 0; k < 4; k++)
{
for (int l = 0; l < 3; l++)
{
p[j, k, l] = cpdata[patchdata[i, (j * 4 + k)], l];
q[j, k, l] = cpdata[patchdata[i, (j * 4 + (3 - k))], l];
if (l == 1)
{
q[j, k, l] *= -1.0f;
}
if (i < 6)
{
r[j, k, l] =
cpdata[patchdata[i, (j * 4 + (3 - k))], l];
if (l == 0)
{
r[j, k, l] *= -1.0f;
}
s[j, k, l] = cpdata[patchdata[i, (j * 4 + k)], l];
if (l == 0)
{
s[j, k, l] *= -1.0f;
}
if (l == 1)
{
s[j, k, l] *= -1.0f;
}
}
}
}
}
gl.Map2(OpenGL.GL_MAP2_TEXTURE_COORD_2, 0.0f, 1.0f, 2, 2, 0.0f, 1.0f, 4, 2,
tex.Flatten());
gl.Map2(OpenGL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
p.Flatten());
gl.MapGrid2(grid, 0.0, 1.0, grid, 0.0, 1.0);
gl.EvalMesh2(type, 0, grid, 0, grid);
gl.Map2(OpenGL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
q.Flatten());
gl.EvalMesh2(type, 0, grid, 0, grid);
if (i < 6)
{
gl.Map2(OpenGL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
r.Flatten());
gl.EvalMesh2(type, 0, grid, 0, grid);
gl.Map2(OpenGL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
s.Flatten());
gl.EvalMesh2(type, 0, grid, 0, grid);
}
}
gl.PopMatrix();
gl.PopAttrib();
}