mirror of
https://github.com/buserror/mii_emu.git
synced 2024-11-25 20:33:52 +00:00
149 lines
2.7 KiB
C
149 lines
2.7 KiB
C
/*
|
|
* c2_geometry.h
|
|
*
|
|
* C2DGeometry Implementation
|
|
* Created: Monday, March 30, 1998 11:51:47
|
|
* Converted back to C99 May 2013
|
|
*
|
|
* Copyright (C) 1998-2023 Michel Pollet <buserror@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: MIT
|
|
*/
|
|
|
|
#ifndef __C2_GEOMETRY_H__
|
|
#define __C2_GEOMETRY_H__
|
|
|
|
#include <stdint.h>
|
|
|
|
#define PMIN(x1,x2) ((x1 < x2) ? x1 : x2)
|
|
#define PMAX(x1,x2) ((x1 > x2) ? x1 : x2)
|
|
|
|
typedef int32_t c2_coord_t;
|
|
|
|
enum {
|
|
X = 0, Y,
|
|
// L = 0, T, R, B,
|
|
};
|
|
|
|
//
|
|
// a basic x,y point
|
|
//
|
|
typedef union c2_pt_t {
|
|
struct {
|
|
c2_coord_t x, y;
|
|
};
|
|
c2_coord_t v[2];
|
|
} c2_pt_t;//, *c2_pt_p;
|
|
#define c2_pt_p union c2_pt_t*
|
|
|
|
#define C2_PT(_a, _b) (c2_pt_t){ .x = (_a), .y = (_b) }
|
|
#define C2_PT_ZERO C2_PT(0,0)
|
|
|
|
//
|
|
// a basic segment, a pair of points
|
|
//
|
|
typedef struct c2_segment_t {
|
|
c2_pt_t a, b;
|
|
} c2_segment_t;//, *c2_segment_p;
|
|
#define c2_segment_p struct c2_segment_t*
|
|
|
|
#define C2_SEGMENT_ZERO { C2_PT_ZERO, C2_PT_ZERO }
|
|
|
|
//
|
|
// a rectangle defined by two points
|
|
//
|
|
typedef union c2_rect_t {
|
|
struct {
|
|
c2_pt_t tl, br;
|
|
};
|
|
c2_coord_t v[4];
|
|
struct {
|
|
c2_coord_t l,t,r,b;
|
|
};
|
|
} c2_rect_t;//, *c2_rect_p;
|
|
#define c2_rect_p union c2_rect_t*
|
|
|
|
#define C2_RECT(_l,_t,_r,_b) (c2_rect_t){ .l = _l, .t = _t, .r = _r, .b = _b }
|
|
#define C2_RECT_WH(_l,_t,_w,_h) (c2_rect_t){ \
|
|
.l = _l, .t = _t, .r = (_l)+(_w), .b = (_t)+(_h) }
|
|
/* Return the squared surface of the rectangle, for area comparison sake */
|
|
#define c2_rect_surface_squared(_r) \
|
|
((c2_rect_width(_r)*c2_rect_width(_r))+\
|
|
(c2_rect_height(_r)*c2_rect_height(_r)))
|
|
|
|
#define C2_RECT_ZERO C2_RECT(0,0,0,0)
|
|
|
|
int
|
|
c2_rect_contains_rect(
|
|
const c2_rect_p r1,
|
|
const c2_rect_p r2 );
|
|
|
|
int
|
|
c2_rect_clip_segment(
|
|
const c2_rect_p r,
|
|
c2_segment_p s,
|
|
c2_segment_p o,
|
|
char * outEdges );
|
|
int
|
|
c2_rect_clip_rect(
|
|
const c2_rect_p r,
|
|
const c2_rect_p s,
|
|
c2_rect_p o );
|
|
int
|
|
c2_rect_intersect_rect(
|
|
const c2_rect_p s,
|
|
const c2_rect_p r );
|
|
|
|
enum {
|
|
out_Left = (1 << 0),
|
|
out_Top = (1 << 1),
|
|
out_Right = (1 << 2),
|
|
out_Bottom = (1 << 3),
|
|
};
|
|
enum {
|
|
corner_TopLeft = out_Left,
|
|
corner_TopRight = out_Top,
|
|
corner_BottomRight = out_Right,
|
|
corner_BottomLeft = out_Bottom,
|
|
};
|
|
|
|
uint8_t
|
|
c2_rect_get_out_code(
|
|
const c2_rect_p r,
|
|
const c2_pt_p p );
|
|
void
|
|
c2_rect_clip_pt(
|
|
const c2_rect_p r,
|
|
c2_pt_p p );
|
|
|
|
uint8_t
|
|
c2_rect_get_next_edge(
|
|
uint8_t inEdge,
|
|
int inCW );
|
|
uint8_t
|
|
c2_rect_is_on_edge(
|
|
const c2_rect_p r,
|
|
const c2_pt_p p );
|
|
int
|
|
c2_rect_get_edge(
|
|
const c2_rect_p r,
|
|
uint8_t inEdge,
|
|
c2_segment_p outEdge );
|
|
int
|
|
c2_rect_get_corner(
|
|
const c2_rect_p r,
|
|
uint8_t inCorner,
|
|
c2_pt_p outCorner,
|
|
int inCW );
|
|
|
|
const char *
|
|
c2_rect_as_str(
|
|
const c2_rect_p r );
|
|
|
|
#ifndef C2_GEOMETRY_INLINE_H_
|
|
#ifndef C2_DECL
|
|
#include "c2_geometry_inline.h"
|
|
#endif
|
|
#endif
|
|
#endif
|