diff options
Diffstat (limited to 'ftnoir_posewidget')
| -rw-r--r-- | ftnoir_posewidget/glwidget.cpp | 81 |
1 files changed, 42 insertions, 39 deletions
diff --git a/ftnoir_posewidget/glwidget.cpp b/ftnoir_posewidget/glwidget.cpp index de19e91d..3ce44815 100644 --- a/ftnoir_posewidget/glwidget.cpp +++ b/ftnoir_posewidget/glwidget.cpp @@ -51,35 +51,39 @@ void GLWidget::rotateBy(double xAngle, double yAngle, double zAngle) update();
}
-static __inline double dot(const Vec2f& p1, const Vec2f& p2) {
- return p1.x * p2.x + p1.y * p2.y;
-}
-
-static bool barycentric_coords(const Vec2f& p1,
- const Vec2f& p2,
- const Vec2f& p3,
- const Vec2f& px,
- Vec2f& uv)
-{
- Vec2f v0(p3.x - p1.x, p3.y - p1.y);
- Vec2f v1(p2.x - p1.x, p2.y - p1.y);
- Vec2f v2(px.x - p1.x, px.y - p1.y);
-
- double dot00 = dot(v0, v0);
- double dot01 = dot(v0, v1);
- double dot02 = dot(v0, v2);
- double dot11 = dot(v1, v1);
- double dot12 = dot(v1, v2);
-
- double invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
- double u = (dot11 * dot02 - dot01 * dot12) * invDenom;
- double v = (dot00 * dot12 - dot01 * dot02) * invDenom;
-
- uv.x = u;
- uv.y = v;
-
- return (u >= 0) && (v >= 0) && (u + v <= 1);
-}
+class Triangle {
+public:
+ Triangle(const Vec2f& p1,
+ const Vec2f& p2,
+ const Vec2f& p3)
+ {
+ origin = p1;
+ v0 = Vec2f(p3.x - p1.x, p3.y - p1.y);
+ v1 = Vec2f(p2.x - p1.x, p2.y - p1.y);
+ dot00 = dot(v0, v0);
+ dot01 = dot(v0, v1);
+ dot11 = dot(v1, v1);
+ invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
+ }
+ bool barycentric_coords(const Vec2f& px, Vec2f& uv) const
+ {
+ Vec2f v2(px.x - origin.x, px.y - origin.y);
+ double dot12 = dot(v1, v2);
+ double dot02 = dot(v0, v2);
+ double u = (dot11 * dot02 - dot01 * dot12) * invDenom;
+ double v = (dot00 * dot12 - dot01 * dot02) * invDenom;
+ uv.x = u;
+ uv.y = v;
+ return (u >= 0) && (v >= 0) && (u + v <= 1);
+ }
+
+private:
+ double dot00, dot01, dot11, invDenom;
+ Vec2f v0, v1, origin;
+ double dot(const Vec2f& p1, const Vec2f& p2) const {
+ return p1.x * p2.x + p1.y * p2.y;
+ }
+};
static __inline Vec3f normal(const Vec3f& p1, const Vec3f& p2, const Vec3f& p3)
{
@@ -146,8 +150,11 @@ void GLWidget::project_quad_texture() { { Vec2f(0, 0), Vec2f(ow-1, 0), Vec2f(0, oh-1) },
{ Vec2f(ow-1, oh-1), Vec2f(ow-1, 0), Vec2f(0, oh-1) }
};
+ const Triangle triangles[2] = {
+ Triangle(projected[0][0], projected[0][1], projected[0][2]),
+ Triangle(projected[1][0], projected[1][1], projected[1][2])
+ };
- double sqrt2 = std::sqrt(2.0);
int orig_pitch = tex.bytesPerLine();
int dest_pitch = texture.bytesPerLine();
@@ -168,11 +175,7 @@ void GLWidget::project_quad_texture() { pos.y = y;
for (int i = 0; i < 2; i++) {
Vec2f coords;
- if (barycentric_coords(projected[i][0],
- projected[i][1],
- projected[i][2],
- pos,
- coords))
+ if (triangles[i].barycentric_coords(pos, coords))
{
double qx = origs[i][0].x
+ coords.x * (origs[i][2].x - origs[i][0].x)
@@ -190,10 +193,10 @@ void GLWidget::project_quad_texture() { double dx2 = qx2 - qx;
double dy2 = qy2 - qy;
- double d1 = sqrt2 - std::sqrt(dx1 * dx1 + dy1 * dy1);
- double d2 = sqrt2 - std::sqrt(dx2 * dx2 + dy2 * dy2);
- double d3 = sqrt2 - std::sqrt(dx2 * dx2 + dy1 * dy1);
- double d4 = sqrt2 - std::sqrt(dx1 * dx1 + dy2 * dy2);
+ double d1 = 2 - (dx1 * dx1 + dy1 * dy1);
+ double d2 = 2 - (dx2 * dx2 + dy2 * dy2);
+ double d3 = 2 - (dx2 * dx2 + dy1 * dy1);
+ double d4 = 2 - (dx1 * dx1 + dy2 * dy2);
double inv_norm = 1. / (d1 + d2 + d3 + d4);
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