*wog

1 files changed, 33 insertions, 12 deletions

diff --git a/src/shaders/common.h b/src/shaders/common.h
index cae9309..7e0ca5f 100644
--- a/src/shaders/common.h
+++ b/src/shaders/common.h
@@ -1,12 +1,33 @@
 #ifndef _SOFTSHADEROOM_COMMON_HEADER_H_
 #define _SOFTSHADEROOM_COMMON_HEADER_H_
-
-/*
-** Common shader header
-*/
 #include "../core/shader.h"
 
-extern void ssrR_putline(int x0, int y0, int x1, int y1, Color color);
+/************************************************************************/
+/* constants                                                            */
+/************************************************************************/
+
+#define SSR_PI            3.14159265359f
+#define SSR_TWO_PI        6.28318530718f
+#define SSR_FOUR_PI       12.56637061436f
+#define SSR_INV_PI        0.31830988618f
+#define SSR_INV_TWO_PI    0.15915494309f
+#define SSR_INV_FOUR_PI   0.07957747155f
+#define SSR_HALF_PI       1.57079632679f
+#define SSR_INV_HALF_PI   0.636619772367f
+
+/************************************************************************/
+/* variables                                                            */
+/************************************************************************/
+
+#define _model_matrix (uniforms->model)
+#define _view_matrix (uniforms->view)
+#define _proj_matrix (uniforms->projection)
+#define _mvp_matrix (uniforms->mvp)
+#define _it_model_matrix /*inverse-transpose model matrix if needed*/
+
+/************************************************************************/
+/* functions                                                            */
+/************************************************************************/
 
 /*shader built in functions*/
 Vec3 normal_from_color(Color32 c32);
@@ -20,6 +41,8 @@ Vec2 texsize(Texture* texture);
 do{ \
 if(cond) return 0; \
 }while(0)
+#define discard()  return 0
+#define keep()     return 1
 
 #define MVP_PROCESS \
 do{																										 \
@@ -27,18 +50,16 @@ static Vec4 p; p.xyz = in->vertex->position; p.w = 1;	 \
 mat4_mulvec4(uniforms->mvp, &p, clipcoord);						 \
 }while(0)																							 
 
-#define _model_matrix (uniforms->model)
-#define _view_matrix (uniforms->view)
-#define _proj_matrix (uniforms->projection)
-#define _mvp_matrix (uniforms->mvp)
-#define _inverse_model_matrix   (uniforms->inverse_model)
-
 #define object2clip(pos, out)    mat4_mulvec4(_mvp_matrix, pos, out);
 
 /*need defined _it_model_matrix of model matrix, i-nverse, t-ranspose*/
 #define object2world_normal(normal, out)    \
 mat4_mulvec4(_it_model_matrix, normal, out)
 
-
+/*take sample from normal map and translate to normal*/
+#define unpack_normal(color, out_v3) \
+out_v3->x = color.x * 2 - 1; \
+out_v3->y = color.y * 2 - 1; \
+out_v3->z = color.z * 2 - 1; 
 
 #endif
\ No newline at end of file