public override void DrawEllipse(PBrush c, float width, RectangleF rect)
{
const int DETAIL = 50;
float x = (rect.Left + rect.Right) / 2f;
float y = (rect.Top + rect.Bottom) / 2f;
float rx = (rect.Right - rect.Left) / 2f;
float ry = (rect.Bottom - rect.Top) / 2f;
float w = 1 - width * 2f / (rx + ry);
if (c != null)
{
GL.Color(c.GetColor());
}
GL.Begin(PrimitiveType.QUADS);
double lA = 0;
for (int i = 1; i <= DETAIL; i++)
{
double a = i * Math.PI * 2.0 / DETAIL;
float sin1 = (float)Math.Sin(lA);
float cos1 = (float)Math.Cos(lA);
float sin2 = (float)Math.Sin(a);
float cos2 = (float)Math.Cos(a);
float[] ptsx = new float[] { cos1, cos1 *w, cos2 *w, cos2 };
float[] ptsy = new float[] { sin1, sin1 *w, sin2 *w, sin2 };
NativeGL.nglVertex2fTrans(4, ptsx, ptsy, x, y, rx, ry);
lA = a;
}
GL.End();
}
public override void SetRenderTarget(RenderBitmap bmp)
{
if (bmp == null || !(bmp is RenderBitmap3))
{
NativeGL.nglBindFramebuffer(0);
}
else
{
((RenderBitmap3)bmp).FBO.Bind();
}
}
public override void FillEllipse(PBrush c, RectangleF rect)
{
float x = (rect.Left + rect.Right) / 2f;
float y = (rect.Top + rect.Bottom) / 2f;
float rx = (rect.Right - rect.Left) / 2f;
float ry = (rect.Bottom - rect.Top) / 2f;
if (c != null)
{
GL.Color(c.GetColor());
}
GL.Begin(PrimitiveType.TRIANGLES);
NativeGL.nglVertex2fTrans(pEllipseX.Length, pEllipseX, pEllipseY, x, y, rx, ry);
GL.End();
}
public override void Init()
{
ctx.InitAsync();
ctx.MakeCurrent();
NativeGL.nglInit();
Opengl32.glBlendFunc(GLConsts.GL_SRC_ALPHA, GLConsts.GL_ONE_MINUS_SRC_ALPHA);
Opengl32.glEnable(GLConsts.GL_BLEND);
int eSize = 32;
ellipse = new gdi.Bitmap(eSize, eSize);
var g = gdi.Graphics.FromImage(ellipse);
g.Clear(gdi.Color.Transparent);
g.SmoothingMode = gdi2d.SmoothingMode.HighQuality;
g.FillEllipse(gdi.Brushes.White, new RectangleF(1, 1, eSize - 2, eSize - 2));
texEllipse = Kritzel.GLRenderer.Util.LoadTexture(ellipse);
int eDet = 16;
pEllipseX = new float[3 * eDet];
pEllipseY = new float[3 * eDet];
float l_x = 1, l_y = 0;
for (int i = 0; i < eDet; i++)
{
float arg = (i + 1) / (float)eDet * 2 * (float)Math.PI;
float x = (float)Math.Cos(arg);
float y = (float)Math.Sin(arg);
pEllipseX[i * 3] = l_x;
pEllipseY[i * 3] = l_y;
pEllipseX[i * 3 + 1] = 0;
pEllipseY[i * 3 + 1] = 0;
l_x = x; l_y = y;
pEllipseX[i * 3 + 2] = x;
pEllipseY[i * 3 + 2] = y;
}
}
public override void Circle(float x, float y, float r)
{
NativeGL.nglVertex2fTrans(pEllipseX.Length, pEllipseX, pEllipseY,
x, y, r, r);
}
