public override void DrawLine(Vector2Df Start, Vector2Df End)
{
if (m_LineImageCache == null)
{
//m_LineImageCache = new BufferedImage(4, 1, BufferedImage.PixelType.INT_ARGB);
//renderer.FillRect(1, 0, 1, 1);
m_LineImageCache = new BufferedImage(4, 4, BufferedImage.PixelType.INT_ARGB);
Renderer2D renderer = m_LineImageCache.GetRenderer2D;
renderer.Color.AlphaI = 0;
renderer.FillRect(0, 0, 4, 4);
renderer.Color.AlphaI = 255;
renderer.FillRect(1, 2, 1, 2);
#if false // Fill in the rest of the pixels for testing
renderer.Color.RedI = 0;
renderer.FillRect(0, 0, 4, 1);
renderer.FillRect(3, 0, 1, 4);
renderer.Color.BlueI = 0;
renderer.FillRect(0, 1, 1, 3);
renderer.FillRect(0, 1, 3, 1);
renderer.FillRect(2, 1, 1, 3);
#endif
}
ImageGLDisplayListPlugin GLBuffer = ImageGLDisplayListPlugin.GetImageGLDisplayListPlugin(m_LineImageCache);
Gl.glEnable(Gl.GL_TEXTURE_2D);
Gl.glEnable(Gl.GL_BLEND);
Gl.glBlendFunc(Gl.GL_SRC_ALPHA, Gl.GL_ONE_MINUS_SRC_ALPHA);
Gl.glColor4f(m_Color.RedF, m_Color.GreenF, m_Color.BlueF, m_Color.AlphaF);
Vector2Df Normal = (End - Start);
Vector2Df PerpendicularNormal = Normal.GetPerpendicularNormal();
float Width = 1;
Vector2Df OffsetPos = PerpendicularNormal * Width;
Vector2Df OffsetNeg = PerpendicularNormal * -(Width + 1);
PushOrthoProjection();
Gl.glBindTexture(Gl.GL_TEXTURE_2D, GLBuffer.GLTextureHandle);
Gl.glBegin(Gl.GL_QUADS);
#if true
Gl.glTexCoord2d(0, .75); Gl.glVertex2f(Start.x + OffsetPos.x, Start.y + OffsetPos.y);
Gl.glTexCoord2d(0, 1); Gl.glVertex2f(End.x + OffsetPos.x, End.y + OffsetPos.y);
Gl.glTexCoord2d(.75, 1); Gl.glVertex2f(End.x + OffsetNeg.x, End.y + OffsetNeg.y);
Gl.glTexCoord2d(.75, .5); Gl.glVertex2f(Start.x + OffsetNeg.x, Start.y + OffsetNeg.y);
#else
// draw the main line (without the tips)
Gl.glTexCoord2d(0, .75); Gl.glVertex2f(Start.x + OffsetPos.x + Normal.x, Start.y + OffsetPos.y + Normal.y);
Gl.glTexCoord2d(0, 1); Gl.glVertex2f(End.x + OffsetPos.x - Normal.x, End.y + OffsetPos.y - Normal.y);
Gl.glTexCoord2d(.75, 1); Gl.glVertex2f(End.x + OffsetNeg.x - Normal.x, End.y + OffsetNeg.y - Normal.y);
Gl.glTexCoord2d(.75, .5); Gl.glVertex2f(Start.x + OffsetNeg.x + Normal.x, Start.y + OffsetNeg.y + Normal.y);
// draw the ending tip anti-aliased
Gl.glTexCoord2d(0, 1); Gl.glVertex2f(End.x + OffsetPos.x - Normal.x, End.y + OffsetPos.y - Normal.y);
Gl.glTexCoord2d(0, .25); Gl.glVertex2f(End.x + OffsetPos.x, End.y + OffsetPos.y);
Gl.glTexCoord2d(.75, .25); Gl.glVertex2f(End.x + OffsetNeg.x, End.y + OffsetNeg.y);
Gl.glTexCoord2d(.75, 1); Gl.glVertex2f(End.x + OffsetNeg.x - Normal.x, End.y + OffsetNeg.y - Normal.y);
// draw the starting tip anti-aliased
Gl.glTexCoord2d(0, .25); Gl.glVertex2f(Start.x + OffsetPos.x, Start.y + OffsetPos.y);
Gl.glTexCoord2d(0, 1); Gl.glVertex2f(Start.x + OffsetPos.x + Normal.x, Start.y + OffsetPos.y + Normal.y);
Gl.glTexCoord2d(.75, 1); Gl.glVertex2f(Start.x + OffsetNeg.x + Normal.x, Start.y + OffsetNeg.y + Normal.y);
Gl.glTexCoord2d(.75, .25); Gl.glVertex2f(Start.x + OffsetNeg.x, Start.y + OffsetNeg.y);
#endif
Gl.glColor4f(1, 1, 1, 1);
Gl.glEnd();
PopOrthoProjection();
}
