public static void _DrawLineOrtho(Vector2 p1, Vector2 p2, Color color1, Color color2, bool clip = true)
{
SetLineMaterial();
//clip
if (clip)
{
var RT = UI.owner as RectTransform;
if (RT != null)
{
var rect = RT.Rect();
if (LineClip.ClipCohSuth(rect[0], rect[1], ref p1, ref p2) == LineClip.Result.discard)
{
return;
}
}
}
//normalize & flip y
p1 = p1.ToNDC();
p2 = p2.ToNDC();
GL.Begin(GL.LINES);
GL.Color(color1);
GL.Vertex(p1);
GL.Color(color2);
GL.Vertex(p2);
GL.End();
}
// 控制粗细的线条实际是画四边形，不一定与坐标轴垂直。
public static void _DrawLineWidth(Vector2 p1, Vector2 p2, float width, Color color, bool clip = true)
{
SetLineMaterial();
//clip
if (clip)
{
var RT = UI.owner as RectTransform;
if (RT != null)
{
var rect = RT.Rect();
if (LineClip.ClipCohSuth(rect[0], rect[1], ref p1, ref p2) == LineClip.Result.discard)
{
return;
}
}
}
var v = p2 - p1;
var v2 = p1 - p2;
width *= 0.5f;
var p1a = p1 + new Vector2(-v.y, v.x).normalized *width;
var p1b = p1 + new Vector2(v.y, -v.x).normalized *width;
var p2a = p2 + new Vector2(-v2.y, v2.x).normalized *width;
var p2b = p2 + new Vector2(v2.y, -v2.x).normalized *width;
//四边形可能切成更多边形，暂时没做画多边形功能因此暂不裁剪宽度，只裁剪长度
_DrawQuad(color, p1a, p1b, p2a, p2b);
}