diff options
Diffstat (limited to 'arm9/source/template.c')
| -rw-r--r-- | arm9/source/template.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/arm9/source/template.c b/arm9/source/template.c new file mode 100644 index 0000000..ca4f43e --- /dev/null +++ b/arm9/source/template.c @@ -0,0 +1,160 @@ +/* DS Homebrew demo. + * Written by mr b0nk 500 <b0nk@b0nk.xyz>. + */ + + +#include <nds.h> +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <unistd.h> + +struct vec2d { + float x; + float y; +}; + +struct player { + struct vec2d pos; + struct vec2d delta; + float max_vel; + float accel; + int w; + int h; +}; + +void init_player(struct player *p, float x, float y, float max_vel, float accel, int w, int h) { + p->pos.x = x; + p->pos.y = y; + p->delta.x = 0; + p->delta.y = 0; + p->max_vel = max_vel; + p->accel = accel; + p->w = w; + p->h = h; +} + +int main() { + touchPosition old_touch; + touchPosition touch; + + memset(&old_touch, 0, sizeof(old_touch)); + memset(&touch, 0, sizeof(touch)); + + videoSetMode(MODE_0_2D); + videoSetModeSub(MODE_0_2D); + + vramSetBankC(VRAM_C_MAIN_BG); + vramSetBankD(VRAM_D_SUB_SPRITE); + + /*oamInit(&oamMain, SpriteMapping_1D_32, false);*/ + oamInit(&oamSub, SpriteMapping_1D_32, false); + + /*u16 *main_gfx = oamAllocateGfx(&oamMain, SpriteSize_16x16, SpriteColorFormat_256Color);*/ + u16 *sub_gfx = oamAllocateGfx(&oamSub, SpriteSize_16x16, SpriteColorFormat_256Color); + + videoSetMode(MODE_0_2D); + + for (int i = 0; i < (16*16)/2; i++) { + /*main_gfx[i] = 1 | BIT(8);*/ + sub_gfx[i] = 1 | BIT(8); + } + + /*SPRITE_PALETTE[1] = RGB15(31,0,0);*/ + SPRITE_PALETTE_SUB[1] = RGB15(0,31,0); + consoleInit(0, 0, BgType_Text4bpp, BgSize_T_256x256, 31, 0, true, true); + + struct player ply; + struct vec2d drag_speed = {0, 0}; + int max_x = 256; + int min_x = 0; + int max_y = 192; + int min_y = 0; + int frame_step = 0; + int pause = 0; + init_player(&ply, 100, 100, 5.25f, 0.25f, 16, 16); + min_x -= ply.w; + min_y -= ply.h; + + for (;;) { + scanKeys(); + int pressed = keysDown(); + int held = keysHeld(); + + frame_step = (pressed & KEY_R) ? !frame_step : frame_step; + pause = (pressed & KEY_SELECT) ? !pause : pause; + frame_step = (pressed & KEY_SELECT) ? 0 : frame_step; + pause = (frame_step) ? 1 : pause; + + if (!pause || frame_step) { + int up = held & KEY_UP; + int down = held & KEY_DOWN; + int left = held & KEY_LEFT; + int right = held & KEY_RIGHT; + int is_decel_x = (!left && ply.delta.x < 0) || (!right && ply.delta.x > 0); + int is_decel_y = (!up && ply.delta.y < 0) || (!down && ply.delta.y > 0); + + if (held & KEY_TOUCH) { + touchRead(&touch); + touch.px = (touch.px >= max_x+ply.w) ? max_x+ply.w : touch.px; + touch.py = (touch.py >= max_y+ply.h) ? max_y+ply.h : touch.py; + drag_speed.x = (touch.px - old_touch.px)/2; + drag_speed.y = (touch.py - old_touch.py)/2; + ply.delta = drag_speed; + /*ply.delta.x = drag_speed.x; + ply.delta.y = drag_speed.y;*/ + ply.pos.x = touch.px; + ply.pos.y = touch.py; + old_touch = touch; + } + + if (is_decel_x) { + int opposite_x = (right && ply.delta.x < 0) || (left && ply.delta.x > 0); + float tmp_accel = ply.accel*(opposite_x+1); + ply.delta.x += (ply.delta.x > 0) ? -tmp_accel : tmp_accel; + } else if (left || right) { + ply.delta.x += (right) ? ply.accel : -ply.accel; + } + + if (is_decel_y) { + int opposite_y = (down && ply.delta.y < 0) || (up && ply.delta.y > 0); + float tmp_accel = ply.accel*(opposite_y+1); + ply.delta.y += (ply.delta.y > 0) ? -tmp_accel : tmp_accel; + } else if (up || down) { + ply.delta.y += (down) ? ply.accel : -ply.accel; + } + + + + ply.delta.x = (ply.delta.x > ply.max_vel) ? ply.max_vel : ply.delta.x; + ply.delta.y = (ply.delta.y > ply.max_vel) ? ply.max_vel : ply.delta.y; + ply.delta.x = (ply.delta.x < -ply.max_vel) ? -ply.max_vel : ply.delta.x; + ply.delta.y = (ply.delta.y < -ply.max_vel) ? -ply.max_vel : ply.delta.y; + ply.pos.x += ply.delta.x; + ply.pos.y += ply.delta.y; + ply.pos.x = (ply.pos.x > max_x) ? min_x+(ply.delta.x-1) : ply.pos.x; + ply.pos.y = (ply.pos.y > max_y) ? min_y+(ply.delta.y-1) : ply.pos.y; + ply.pos.x = (ply.pos.x < min_x) ? max_x+(ply.delta.x+1) : ply.pos.x; + ply.pos.y = (ply.pos.y < min_y) ? max_y+(ply.delta.y+1) : ply.pos.y; + frame_step = 0; + } + if (held & KEY_START) { + break; + } + + /*oamSet(&oamMain, 0, x, y, 0, 0, SpriteSize_16x16, SpriteColorFormat_256Color, main_gfx, -1, false, false, false, false, false);*/ + + oamSet(&oamSub, 0, (int)ply.pos.x, (int)ply.pos.y, 0, 0, SpriteSize_16x16, SpriteColorFormat_256Color, sub_gfx, -1, false, false, false, false, false); + + swiWaitForVBlank(); + + printf("\x1B[5Hx: % 4.5f, y: % 4.5f\n", ply.pos.x, ply.pos.y); + printf("dx: % 3.5f, dy: % 3.5f\n", ply.delta.x, ply.delta.y); + iprintf("pause: %i, frame_step: %i\n", pause, frame_step); + + /*oamUpdate(&oamMain);*/ + oamUpdate(&oamSub); + } + + return 0; +} |