mii_emu/libmui/mui/c2_geometry.h
Michel Pollet 3fd0540a83 Version 1.5
Changes are just too long to list...

Signed-off-by: Michel Pollet <buserror@gmail.com>
2024-01-20 12:07:47 +00:00

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