initial commit, 4.5 stable

thirdparty/msdfgen/core/Projection.cpp

@@ -0,0 +1,42 @@
+
+#include "Projection.h"
+
+namespace msdfgen {
+
+Projection::Projection() : scale(1), translate(0) { }
+
+Projection::Projection(const Vector2 &scale, const Vector2 &translate) : scale(scale), translate(translate) { }
+
+Point2 Projection::project(const Point2 &coord) const {
+    return scale*(coord+translate);
+}
+
+Point2 Projection::unproject(const Point2 &coord) const {
+    return coord/scale-translate;
+}
+
+Vector2 Projection::projectVector(const Vector2 &vector) const {
+    return scale*vector;
+}
+
+Vector2 Projection::unprojectVector(const Vector2 &vector) const {
+    return vector/scale;
+}
+
+double Projection::projectX(double x) const {
+    return scale.x*(x+translate.x);
+}
+
+double Projection::projectY(double y) const {
+    return scale.y*(y+translate.y);
+}
+
+double Projection::unprojectX(double x) const {
+    return x/scale.x-translate.x;
+}
+
+double Projection::unprojectY(double y) const {
+    return y/scale.y-translate.y;
+}
+
+}