sdl-ios-xcode: Xcode-iPhoneOS/Demos/src/accelerometer.c annotate

annotate Xcode-iPhoneOS/Demos/src/accelerometer.c @ 5211:78db79f5a4e2

Updated the iPhone demos for the new API

author	Sam Lantinga <slouken@libsdl.org>
date	Sun, 06 Feb 2011 09:02:10 -0800
parents	e431b888ac6c
children

rev	line source
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	1 /*
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	2 * accelerometer.c
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	3 * written by Holmes Futrell
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	4 * use however you want
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	5 */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	6
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	7 #include "SDL.h"
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	8 #include "math.h"
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	9 #include "common.h"
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	10
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	11 #define MILLESECONDS_PER_FRAME 16 /* about 60 frames per second */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	12 #define DAMPING 0.5f; /* after bouncing off a wall, damping coefficient determines final speed */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	13 #define FRICTION 0.0008f /* coefficient of acceleration that opposes direction of motion */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	14 #define GRAVITY_CONSTANT 0.004f /* how sensitive the ship is to the accelerometer */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	15
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	16 /* If we aren't on an iPhone, then this definition ought to yield reasonable behavior */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	17 #ifndef SDL_IPHONE_MAX_GFORCE
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	18 #define SDL_IPHONE_MAX_GFORCE 5.0f
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	19 #endif
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	20
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	21 static SDL_Joystick accelerometer; / used for controlling the ship */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	22
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	23 static struct
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	24 {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	25 float x, y; /* position of ship */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	26 float vx, vy; /* velocity of ship (in pixels per millesecond) */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	27 SDL_Rect rect; /* (drawn) position and size of ship */
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	28 } shipData;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	29
3685 64ce267332c6 Switched from SDL_WindowID and SDL_TextureID to SDL_Window* and SDL_Texture* for code simplicity and improved performance. Sam Lantinga <slouken@libsdl.org> parents: 3277 diff changeset	30 static SDL_Texture ship = 0; / texture for spaceship */
64ce267332c6 Switched from SDL_WindowID and SDL_TextureID to SDL_Window* and SDL_Texture* for code simplicity and improved performance. Sam Lantinga <slouken@libsdl.org> parents: 3277 diff changeset	31 static SDL_Texture space = 0; / texture for space (background */
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	32
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	33 void
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	34 render(SDL_Renderer *renderer)
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	35 {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	36
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	37
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	38 /* get joystick (accelerometer) axis values and normalize them */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	39 float ax = SDL_JoystickGetAxis(accelerometer, 0);
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	40 float ay = -SDL_JoystickGetAxis(accelerometer, 1);
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	41
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	42 /* ship screen constraints */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	43 Uint32 minx = 0.0f;
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	44 Uint32 maxx = SCREEN_WIDTH - shipData.rect.w;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	45 Uint32 miny = 0.0f;
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	46 Uint32 maxy = SCREEN_HEIGHT - shipData.rect.h;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	47
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	48 #define SINT16_MAX ((float)(0x7FFF))
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	49
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	50 /* update velocity from accelerometer
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	51 the factor SDL_IPHONE_MAX_G_FORCE / SINT16_MAX converts between
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	52 SDL's units reported from the joytick, and units of g-force, as reported by the accelerometer
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	53 */
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	54 shipData.vx +=
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	55 ax * SDL_IPHONE_MAX_GFORCE / SINT16_MAX * GRAVITY_CONSTANT *
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	56 MILLESECONDS_PER_FRAME;
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	57 shipData.vy +=
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	58 ay * SDL_IPHONE_MAX_GFORCE / SINT16_MAX * GRAVITY_CONSTANT *
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	59 MILLESECONDS_PER_FRAME;
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	60
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	61 float speed = sqrt(shipData.vx * shipData.vx + shipData.vy * shipData.vy);
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	62
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	63 if (speed > 0) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	64 /* compensate for friction */
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	65 float dirx = shipData.vx / speed; /* normalized x velocity */
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	66 float diry = shipData.vy / speed; /* normalized y velocity */
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	67
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	68 /* update velocity due to friction */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	69 if (speed - FRICTION * MILLESECONDS_PER_FRAME > 0) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	70 /* apply friction */
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	71 shipData.vx -= dirx * FRICTION * MILLESECONDS_PER_FRAME;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	72 shipData.vy -= diry * FRICTION * MILLESECONDS_PER_FRAME;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	73 } else {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	74 /* applying friction would MORE than stop the ship, so just stop the ship */
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	75 shipData.vx = 0.0f;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	76 shipData.vy = 0.0f;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	77 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	78 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	79
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	80 /* update ship location */
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	81 shipData.x += shipData.vx * MILLESECONDS_PER_FRAME;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	82 shipData.y += shipData.vy * MILLESECONDS_PER_FRAME;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	83
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	84 if (shipData.x > maxx) {
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	85 shipData.x = maxx;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	86 shipData.vx = -shipData.vx * DAMPING;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	87 } else if (shipData.x < minx) {
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	88 shipData.x = minx;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	89 shipData.vx = -shipData.vx * DAMPING;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	90 }
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	91 if (shipData.y > maxy) {
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	92 shipData.y = maxy;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	93 shipData.vy = -shipData.vy * DAMPING;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	94 } else if (shipData.y < miny) {
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	95 shipData.y = miny;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	96 shipData.vy = -shipData.vy * DAMPING;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	97 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	98
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	99 /* draw the background */
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	100 SDL_RenderCopy(renderer, space, NULL, NULL);
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	101
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	102 /* draw the ship */
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	103 shipData.rect.x = shipData.x;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	104 shipData.rect.y = shipData.y;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	105
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	106 SDL_RenderCopy(renderer, ship, NULL, &shipData.rect);
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	107
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	108 /* update screen */
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	109 SDL_RenderPresent(renderer);
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	110
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	111 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	112
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	113 void
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	114 initializeTextures(SDL_Renderer *renderer)
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	115 {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	116
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	117 SDL_Surface *bmp_surface;
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	118
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	119 /* load the ship */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	120 bmp_surface = SDL_LoadBMP("ship.bmp");
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	121 if (bmp_surface == NULL) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	122 fatalError("could not ship.bmp");
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	123 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	124 /* set blue to transparent on the ship */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	125 SDL_SetColorKey(bmp_surface, 1,
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	126 SDL_MapRGB(bmp_surface->format, 0, 0, 255));
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	127
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	128 /* create ship texture from surface */
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	129 ship = SDL_CreateTextureFromSurface(renderer, bmp_surface);
3685 64ce267332c6 Switched from SDL_WindowID and SDL_TextureID to SDL_Window* and SDL_Texture* for code simplicity and improved performance. Sam Lantinga <slouken@libsdl.org> parents: 3277 diff changeset	130 if (ship == 0) {
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	131 fatalError("could not create ship texture");
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	132 }
3685 64ce267332c6 Switched from SDL_WindowID and SDL_TextureID to SDL_Window* and SDL_Texture* for code simplicity and improved performance. Sam Lantinga <slouken@libsdl.org> parents: 3277 diff changeset	133 SDL_SetTextureBlendMode(ship, SDL_BLENDMODE_BLEND);
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	134
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	135 /* set the width and height of the ship from the surface dimensions */
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	136 shipData.rect.w = bmp_surface->w;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	137 shipData.rect.h = bmp_surface->h;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	138
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	139 SDL_FreeSurface(bmp_surface);
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	140
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	141 /* load the space background */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	142 bmp_surface = SDL_LoadBMP("space.bmp");
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	143 if (bmp_surface == NULL) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	144 fatalError("could not load space.bmp");
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	145 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	146 /* create space texture from surface */
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	147 space = SDL_CreateTextureFromSurface(renderer, bmp_surface);
3685 64ce267332c6 Switched from SDL_WindowID and SDL_TextureID to SDL_Window* and SDL_Texture* for code simplicity and improved performance. Sam Lantinga <slouken@libsdl.org> parents: 3277 diff changeset	148 if (space == 0) {
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	149 fatalError("could not create space texture");
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	150 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	151 SDL_FreeSurface(bmp_surface);
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	152
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	153 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	154
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	155
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	156
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	157 int
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	158 main(int argc, char *argv[])
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	159 {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	160
3685 64ce267332c6 Switched from SDL_WindowID and SDL_TextureID to SDL_Window* and SDL_Texture* for code simplicity and improved performance. Sam Lantinga <slouken@libsdl.org> parents: 3277 diff changeset	161 SDL_Window window; / main window */
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	162 SDL_Renderer *renderer;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	163 Uint32 startFrame; /* time frame began to process */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	164 Uint32 endFrame; /* time frame ended processing */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	165 Uint32 delay; /* time to pause waiting to draw next frame */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	166 int done; /* should we clean up and exit? */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	167
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	168 /* initialize SDL */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	169 if (SDL_Init(SDL_INIT_VIDEO \| SDL_INIT_JOYSTICK) < 0) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	170 fatalError("Could not initialize SDL");
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	171 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	172
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	173 /* create main window and renderer */
3685 64ce267332c6 Switched from SDL_WindowID and SDL_TextureID to SDL_Window* and SDL_Texture* for code simplicity and improved performance. Sam Lantinga <slouken@libsdl.org> parents: 3277 diff changeset	174 window = SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	175 SDL_WINDOW_OPENGL \| SDL_WINDOW_SHOWN \|
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	176 SDL_WINDOW_BORDERLESS);
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	177 renderer = SDL_CreateRenderer(window, 0, 0);
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	178
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	179 /* print out some info about joysticks and try to open accelerometer for use */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	180 printf("There are %d joysticks available\n", SDL_NumJoysticks());
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	181 printf("Default joystick (index 0) is %s\n", SDL_JoystickName(0));
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	182 accelerometer = SDL_JoystickOpen(0);
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	183 if (accelerometer == NULL) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	184 fatalError("Could not open joystick (accelerometer)");
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	185 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	186 printf("joystick number of axis = %d\n",
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	187 SDL_JoystickNumAxes(accelerometer));
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	188 printf("joystick number of hats = %d\n",
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	189 SDL_JoystickNumHats(accelerometer));
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	190 printf("joystick number of balls = %d\n",
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	191 SDL_JoystickNumBalls(accelerometer));
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	192 printf("joystick number of buttons = %d\n",
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	193 SDL_JoystickNumButtons(accelerometer));
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	194
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	195 /* load graphics */
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	196 initializeTextures(renderer);
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	197
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	198 /* setup ship */
3690 e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	199 shipData.x = (SCREEN_WIDTH - shipData.rect.w) / 2;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	200 shipData.y = (SCREEN_HEIGHT - shipData.rect.h) / 2;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	201 shipData.vx = 0.0f;
e431b888ac6c Fixed compilation on iPhone Sam Lantinga <slouken@libsdl.org> parents: 3685 diff changeset	202 shipData.vy = 0.0f;
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	203
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	204 done = 0;
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	205 /* enter main loop */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	206 while (!done) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	207 startFrame = SDL_GetTicks();
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	208 SDL_Event event;
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	209 while (SDL_PollEvent(&event)) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	210 if (event.type == SDL_QUIT) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	211 done = 1;
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	212 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	213 }
5211 78db79f5a4e2 Updated the iPhone demos for the new API Sam Lantinga <slouken@libsdl.org> parents: 3690 diff changeset	214 render(renderer);
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	215 endFrame = SDL_GetTicks();
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	216
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	217 /* figure out how much time we have left, and then sleep */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	218 delay = MILLESECONDS_PER_FRAME - (endFrame - startFrame);
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	219 if (delay < 0) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	220 delay = 0;
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	221 } else if (delay > MILLESECONDS_PER_FRAME) {
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	222 delay = MILLESECONDS_PER_FRAME;
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	223 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	224 SDL_Delay(delay);
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	225 }
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	226
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	227 /* delete textures */
3685 64ce267332c6 Switched from SDL_WindowID and SDL_TextureID to SDL_Window* and SDL_Texture* for code simplicity and improved performance. Sam Lantinga <slouken@libsdl.org> parents: 3277 diff changeset	228 SDL_DestroyTexture(ship);
64ce267332c6 Switched from SDL_WindowID and SDL_TextureID to SDL_Window* and SDL_Texture* for code simplicity and improved performance. Sam Lantinga <slouken@libsdl.org> parents: 3277 diff changeset	229 SDL_DestroyTexture(space);
3277 20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	230
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	231 /* shutdown SDL */
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	232 SDL_Quit();
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	233
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	234 return 0;
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	235
20326ba2bda2 This name inconsistency has been bugging me for a while... Sam Lantinga <slouken@libsdl.org> parents: diff changeset	236 }

Mercurial > sdl-ios-xcode

annotate Xcode-iPhoneOS/Demos/src/accelerometer.c @ 5211:78db79f5a4e2