1.1 --- a/src/mglimpl.h	Sun Sep 22 02:47:46 2013 +0300
     1.2 +++ b/src/mglimpl.h	Sun Sep 22 06:38:08 2013 +0300
     1.3 @@ -5,6 +5,7 @@
     1.4  
     1.5  #define MATRIX_STACK_SIZE	8
     1.6  #define MAX_LIGHTS			4
     1.7 +#define MAX_CLIP_PLANES		6
     1.8  
     1.9  #define ZTILE_SIZE			16384
    1.10  #define ZTILE_SHIFT			14
    1.11 @@ -34,6 +35,11 @@
    1.12  	int cidx;
    1.13  };
    1.14  
    1.15 +struct plane {
    1.16 +	vec3_t pt;
    1.17 +	vec3_t normal;
    1.18 +};
    1.19 +
    1.20  struct texture {
    1.21  	int width, height;
    1.22  	int xshift, yshift;
    1.23 @@ -47,12 +53,15 @@
    1.24  	int mmode, mtop[2];
    1.25  	mat4_t matrix[2][MATRIX_STACK_SIZE];
    1.26  	int prim;
    1.27 -	struct vertex curv, v[4];
    1.28 +	struct vertex curv, v[6];
    1.29  	int vidx;
    1.30  	int vp[4];	/* viewport */
    1.31  	int col_range;	/* color interpolation range */
    1.32  	vec4_t lpos[MAX_LIGHTS];
    1.33  	float lint[MAX_LIGHTS];
    1.34 +	float ambient;
    1.35 +
    1.36 +	struct plane clip_planes[MAX_CLIP_PLANES + 1];
    1.37  
    1.38  	struct texture tex;
    1.39  };
    1.40 @@ -64,6 +73,7 @@
    1.41  	int num_ztiles;
    1.42  };
    1.43  
    1.44 +#define IS_ENABLED(f, x)	((f) & (1 << (x)))
    1.45  
    1.46  #define vertex_to_fixedvertex(v, vx) \
    1.47  	do { \
    1.48 @@ -91,4 +101,7 @@
    1.49  void mgl_draw_line(struct vertex *v0, struct vertex *v1);
    1.50  void mgl_draw_poly(struct vertex *v, int numv);
    1.51  
    1.52 +int mgl_clip_init(struct state *state);
    1.53 +int mgl_clip_poly(struct vertex *v, int vnum);
    1.54 +
    1.55  #endif	/* MGL_IMPL_H_ */