public void DrawLine(IVector <T> Start, IVector <T> End, bool DoAA)
{
if (Start == End)
{
return;
}
Gl.glPushAttrib(Gl.GL_ALL_ATTRIB_BITS);
CheckLineImageCache();
ImageGLDisplayListPlugin <T> GLBuffer = ImageGLDisplayListPlugin <T> .GetImageGLDisplayListPlugin(m_LineImageCache);
Gl.glEnable(Gl.GL_BLEND);
Gl.glBlendFunc(Gl.GL_SRC_ALPHA, Gl.GL_ONE_MINUS_SRC_ALPHA);
Gl.glColor4f(0, 0, 0, 1);
IVector <T> Normal = (End.Subtract(Start));
Normal = Normal.Normalize();
IVector <T> PerpendicularNormal = Normal.GetPerpendicular();
float Width = 40;
if (DoAA)
{
Width--;
}
IVector <T> OffsetPos = PerpendicularNormal.Multiply(Width);
IVector <T> OffsetNeg = PerpendicularNormal.Multiply(-(Width + 1));
RendererOpenGL <T> .PushOrthoProjection();
Gl.glDisable(Gl.GL_TEXTURE_2D);
IVector <T> StartLeft = Start.Add(OffsetPos);
IVector <T> StartRight = Start.Add(OffsetNeg);
IVector <T> EndLeft = End.Add(OffsetPos);
IVector <T> EndRight = End.Add(OffsetNeg);
Gl.glBegin(Gl.GL_QUADS);
{
Gl.glVertex2d(StartLeft[0].ToDouble(), StartLeft[1].ToDouble());
Gl.glVertex2d(EndLeft[0].ToDouble(), EndLeft[1].ToDouble());
Gl.glVertex2d(EndRight[0].ToDouble(), EndRight[1].ToDouble());
Gl.glVertex2d(StartRight[0].ToDouble(), StartRight[1].ToDouble());
}
Gl.glEnd();
if (DoAA)
{
double EdgeWith = 2;
//IVector<DoubleComponent> StartLeftAA = StartLeft + PerpendicularNormal * EdgeWith - Normal * EdgeWith;
//IVector<DoubleComponent> StartRightAA = StartRight - PerpendicularNormal * EdgeWith - Normal * EdgeWith;
//IVector<DoubleComponent> EndLeftAA = EndLeft + PerpendicularNormal * EdgeWith + Normal * EdgeWith;
//IVector<DoubleComponent> EndRightAA = EndRight - PerpendicularNormal * EdgeWith + Normal * EdgeWith;
IVector <T> StartLeftAA =
StartLeft
.Add(PerpendicularNormal)
.Multiply(EdgeWith)
.Subtract(Normal)
.Multiply(EdgeWith);
IVector <T> StartRightAA =
StartRight
.Subtract(PerpendicularNormal)
.Multiply(EdgeWith)
.Subtract(Normal)
.Multiply(EdgeWith);
IVector <T> EndLeftAA =
EndLeft
.Add(PerpendicularNormal)
.Multiply(EdgeWith)
.Add(Normal)
.Multiply(EdgeWith);
IVector <T> EndRightAA =
EndRight
.Subtract(PerpendicularNormal)
.Multiply(EdgeWith)
.Add(Normal)
.Multiply(EdgeWith);
Gl.glEnable(Gl.GL_TEXTURE_2D);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, GLBuffer.GLTextureHandle);
Gl.glBegin(Gl.GL_QUADS);
{
// left edge
Gl.glTexCoord2d(0, 0);
Gl.glVertex2d(StartLeft[0].ToDouble(), StartLeft[1].ToDouble());
Gl.glVertex2d(EndLeft[0].ToDouble(), EndLeft[1].ToDouble());
Gl.glTexCoord2d(1, 0);
Gl.glVertex2d(EndLeftAA[0].ToDouble(), EndLeftAA[1].ToDouble());
Gl.glVertex2d(StartLeftAA[0].ToDouble(), StartLeftAA[1].ToDouble());
// right edge
Gl.glTexCoord2d(0, 0);
Gl.glVertex2d(StartRight[0].ToDouble(), StartRight[1].ToDouble());
Gl.glVertex2d(EndRight[0].ToDouble(), EndRight[1].ToDouble());
Gl.glTexCoord2d(1, 0);
Gl.glVertex2d(EndRightAA[0].ToDouble(), EndRightAA[1].ToDouble());
Gl.glVertex2d(StartRightAA[0].ToDouble(), StartRightAA[1].ToDouble());
// start edge
EdgeWith = 20;
Gl.glTexCoord2d(0, 0);
Gl.glVertex2d(StartLeft[0].ToDouble(), StartLeft[1].ToDouble());
Gl.glVertex2d(StartRight[0].ToDouble(), StartRight[1].ToDouble());
Gl.glTexCoord2d(1, 0);
Gl.glVertex2d(StartRightAA[0].ToDouble(), StartRightAA[1].ToDouble());
Gl.glVertex2d(StartLeftAA[0].ToDouble(), StartLeftAA[1].ToDouble());
// end edge
Gl.glTexCoord2d(0, 0);
Gl.glVertex2d(EndLeft[0].ToDouble(), EndLeft[1].ToDouble());
Gl.glVertex2d(EndRight[0].ToDouble(), EndRight[1].ToDouble());
Gl.glTexCoord2d(1, 0);
Gl.glVertex2d(EndRightAA[0].ToDouble(), EndRightAA[1].ToDouble());
Gl.glVertex2d(EndLeftAA[0].ToDouble(), EndLeftAA[1].ToDouble());
}
Gl.glEnd();
}
RendererOpenGL <T> .PopOrthoProjection();
Gl.glPopAttrib();
}