bring flat triangle rasterization back, with some goodies for future shading work. add uv coordinates to the vertex.

1 files changed, 14 insertions, 0 deletions

diff --git a/graphics.h b/graphics.h
index 44f213d..8e63b67 100644
--- a/graphics.h
+++ b/graphics.h
@@ -8,6 +8,7 @@ typedef struct Vertex Vertex;
 typedef struct Framebuffer Framebuffer;
 typedef struct Viewport Viewport;
 typedef struct Camera Camera;
+typedef struct Triangle Triangle;
 
 struct Color
 {
@@ -19,6 +20,7 @@ struct Vertex
 	Point3 p;	/* position */
 	Point3 n;	/* surface normal */
 	Color c;	/* shading color */
+	Point2 uv;	/* texture coordinate */
 };
 
 struct Framebuffer
@@ -47,6 +49,11 @@ struct Camera
 	Projection ptype;
 };
 
+struct Triangle
+{
+	Point p0, p1, p2;
+};
+
 /* Camera */
 void configcamera(Camera*, Image*, double, double, double, Projection);
 void placecamera(Camera*, Point3, Point3, Point3);
@@ -64,5 +71,12 @@ Point toviewport(Camera*, Point3);
 Point2 fromviewport(Camera*, Point);
 void perspective(Matrix3, double, double, double, double);
 void orthographic(Matrix3, double, double, double, double, double, double);
+/* temporary debug helpers */
 void line3(Camera*, Point3, Point3, int, int, Image*);
 Point string3(Camera*, Point3, Image*, Font*, char*);
+
+/* triangle */
+Triangle Trian(int, int, int, int, int, int);
+Triangle Trianpt(Point, Point, Point);
+void triangle(Image*, Triangle, int, Image*, Point);
+void filltriangle(Image*, Triangle, Image*, Point);