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collision.h
Go to the documentation of this file.
1
39#ifndef OPENSNES_COLLISION_H
40#define OPENSNES_COLLISION_H
41
42#include <snes/types.h>
43
44/*============================================================================
45 * Types
46 *============================================================================*/
47
54typedef struct {
55 s16 x;
56 s16 y;
57 u16 width;
58 u16 height;
59} Rect;
60
61/*============================================================================
62 * Rectangle Collision Functions
63 *============================================================================*/
64
82u8 collideRect(Rect *a, Rect *b);
83
101u8 collidePoint(s16 x, s16 y, Rect *r);
102
124u8 collideRectEx(Rect *a, Rect *b, s16 *overlapX, s16 *overlapY);
125
126/*============================================================================
127 * Tile-Based Collision Functions
128 *============================================================================*/
129
150u8 collideTile(s16 px, s16 py, u8 *tilemap, u16 mapWidth);
151
164u8 collideTileEx(s16 px, s16 py, u8 *tilemap, u16 mapWidth, u8 tileSize);
165
184u8 collideRectTile(Rect *r, u8 *tilemap, u16 mapWidth);
185
186/*============================================================================
187 * Helper Functions
188 *============================================================================*/
189
199void rectInit(Rect *r, s16 x, s16 y, u16 w, u16 h);
200
208void rectSetPos(Rect *r, s16 x, s16 y);
209
217void rectGetCenter(Rect *r, s16 *cx, s16 *cy);
218
226u8 rectContains(Rect *inner, Rect *outer);
227
228#endif /* OPENSNES_COLLISION_H */
collidePoint
u8 collidePoint(s16 x, s16 y, Rect *r)
Check point vs rectangle collision.
rectInit
void rectInit(Rect *r, s16 x, s16 y, u16 w, u16 h)
Initialize a rectangle.
collideTile
u8 collideTile(s16 px, s16 py, u8 *tilemap, u16 mapWidth)
Check collision with tile at pixel coordinates.
rectSetPos
void rectSetPos(Rect *r, s16 x, s16 y)
Set rectangle position.
collideRectEx
u8 collideRectEx(Rect *a, Rect *b, s16 *overlapX, s16 *overlapY)
Check if two rectangles overlap and return overlap amount.
collideTileEx
u8 collideTileEx(s16 px, s16 py, u8 *tilemap, u16 mapWidth, u8 tileSize)
Check collision with tile using custom tile size.
collideRectTile
u8 collideRectTile(Rect *r, u8 *tilemap, u16 mapWidth)
Check collision between rectangle and tilemap.
rectGetCenter
void rectGetCenter(Rect *r, s16 *cx, s16 *cy)
Get rectangle center point.
collideRect
u8 collideRect(Rect *a, Rect *b)
Check rectangle vs rectangle collision (AABB)
rectContains
u8 rectContains(Rect *inner, Rect *outer)
Check if rectangle is completely inside another.
b
static u16 b
Definition main.c:157
px
static u16 px
Definition main.c:166
a
static u16 a
Definition main.c:157
tilemap
u8 tilemap[]
Tilemap data mapping tile indices to BG1's 32x32 grid.
s16
signed short s16
16-bit signed integer (-32768 to 32767)
Definition types.h:49
u16
unsigned short u16
16-bit unsigned integer (0 to 65535)
Definition types.h:52
u8
unsigned char u8
8-bit unsigned integer (0 to 255)
Definition types.h:46
Rect
Axis-aligned bounding box (rectangle)
Definition collision.h:54
Rect::height
u16 height
Definition collision.h:58
Rect::y
s16 y
Definition collision.h:56
Rect::width
u16 width
Definition collision.h:57
Rect::x
s16 x
Definition collision.h:55
types.h
OpenSNES Standard Types.