Calculate Paddle velocity in (x,y) at time of collision.HEADmaster

Signed-off-by: Matt Turner <mattst88@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/paddle.h b/paddle.h
index 61962e7..9570717 100644
--- a/paddle.h
+++ b/paddle.h
@@ -6,6 +6,7 @@
 
 typedef struct {
 	GLfloat x, y, z;
+	GLfloat prev_x, prev_y;
 	GLfloat w, h;
 	GLfloat r, g, b;
 } Paddle_t;
@@ -14,4 +15,14 @@ void GLPong_PaddleDraw(const Paddle_t * paddle);
 void GLPong_PaddleInit(Paddle_t * paddle, GLfloat z, GLuint texture);
 void GLPong_PaddleMove(Paddle_t * paddle, GLfloat x, GLfloat y);
 
+static inline GLfloat
+GLPong_PaddleXV(const Paddle_t * paddle) {
+	return paddle->x - paddle->prev_x;
+}
+
+static inline GLfloat
+GLPong_PaddleYV(const Paddle_t * paddle) {
+	return paddle->y - paddle->prev_y;
+}
+
 #endif /* PADDLE_H */