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#ifndef _SOFTSHADEROOM_CLIP_H_
#define _SOFTSHADEROOM_CLIP_H_
#include "../util/type.h"
#include "vert.h"
#include "shader.h"
#define LERP(t,a,b) ((1-(t))*(a)+(t)*(b))
typedef struct {
/*clipping coord*/
Vec4 clip_coord;
/*new index*/
uint index;
} ClippedVert;
#define CLIP_BUFFER_SIZE 6
typedef struct {
uint count; /*number of resulting vertices*/
ClippedVert vertices[CLIP_BUFFER_SIZE];
/*temp register*/
float temp_reg_num[REG_NUM_COUNT][CLIP_BUFFER_SIZE];
Vec2 temp_reg_v2[REG_V2_COUNT][CLIP_BUFFER_SIZE];
Vec3 temp_reg_v3[REG_V3_COUNT][CLIP_BUFFER_SIZE];
Vec4 temp_reg_v4[REG_V4_COUNT][CLIP_BUFFER_SIZE];
} ClippedBuffer;
ClippedBuffer clip_buffer; /*clipping result*/
bool clip_triangle(Vec4* c0, Vec4* c1, Vec4* c2, uint i0, uint i1, uint i2, uint varying_flag, ClippedBuffer* clipped);
uint clip_line(Vec4* c0, Vec4* c1, uint i0, uint i1, uint varying_flag, ClippedBuffer* clipped);
uint clip_point(Vec4* c0, uint i0, uint varying_flag, ClippedBuffer* clipped);
#endif
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