diff options
Diffstat (limited to 'scene')
| -rw-r--r-- | scene/gui/texture_progress.cpp | 55 |
1 files changed, 39 insertions, 16 deletions
diff --git a/scene/gui/texture_progress.cpp b/scene/gui/texture_progress.cpp index 4a419098a0..4b3ba6df3c 100644 --- a/scene/gui/texture_progress.cpp +++ b/scene/gui/texture_progress.cpp @@ -117,22 +117,45 @@ Point2 TextureProgress::unit_val_to_uv(float val) { Point2 p = get_relative_center(); - if (val < 0.125) - return Point2(p.x + (1 - p.x) * val * 8, 0); - if (val < 0.25) - return Point2(1, p.y * (val - 0.125) * 8); - if (val < 0.375) - return Point2(1, p.y + (1 - p.y) * (val - 0.25) * 8); - if (val < 0.5) - return Point2(1 - (1 - p.x) * (val - 0.375) * 8, 1); - if (val < 0.625) - return Point2(p.x * (1 - (val - 0.5) * 8), 1); - if (val < 0.75) - return Point2(0, 1 - ((1 - p.y) * (val - 0.625) * 8)); - if (val < 0.875) - return Point2(0, p.y - p.y * (val - 0.75) * 8); - else - return Point2(p.x * (val - 0.875) * 8, 0); + // Minimal version of Liang-Barsky clipping algorithm + float angle = (val * Math_TAU) - Math_PI * 0.5; + Point2 dir = Vector2(Math::cos(angle), Math::sin(angle)); + float t1 = 1.0; + float cp; + float cq; + float cr; + float edgeLeft = 0.0; + float edgeRight = 1.0; + float edgeBottom = 0.0; + float edgeTop = 1.0; + + for (int edge = 0; edge < 4; edge++) { + if (edge == 0) { + if (dir.x > 0) + continue; + cp = -dir.x; + cq = -(edgeLeft - p.x); + } else if (edge == 1) { + if (dir.x < 0) + continue; + cp = dir.x; + cq = (edgeRight - p.x); + } else if (edge == 2) { + if (dir.y > 0) + continue; + cp = -dir.y; + cq = -(edgeBottom - p.y); + } else if (edge == 3) { + if (dir.y < 0) + continue; + cp = dir.y; + cq = (edgeTop - p.y); + } + cr = cq / cp; + if (cr >= 0 && cr < t1) + t1 = cr; + } + return (p + t1 * dir); } Point2 TextureProgress::get_relative_center() { |