move code around
parent
57a2eff6c1
commit
5d088a00d4
134
xormod.c
134
xormod.c
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@ -75,6 +75,74 @@ static void Picture_move(Picture *p, int x, int y) {
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struct int2 { int x; int y; };
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typedef struct {
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union {
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struct {
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Picture *tl;
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Picture *tr;
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Picture *bl;
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Picture *br;
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};
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Picture *pics[4];
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};
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struct int2 offset;
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} Field;
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void Field_init(Field *f, SDL_Renderer *rend, int w, int h) {
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f->tl = Picture_new(rend, 0, 0, w, h, 0xff7fffff);
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f->tr = Picture_new(rend, w, 0, w, h, 0xffff7fff);
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f->bl = Picture_new(rend, 0, h, w, h, 0xffffff7f);
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f->br = Picture_new(rend, w, h, w, h, 0xff7fff7f);
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f->offset = (struct int2){ 0, 0 };
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}
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void Field_scroll(Field *f, SDL_Renderer *rend) {
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int w = f->pics[0]->w;
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int h = f->pics[0]->h;
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if (f->offset.y < f->tl->y1) {
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SWAP(f->tl, f->bl);
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SWAP(f->tr, f->br);
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Picture_move(f->tl, 0, -2*h);
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Picture_move(f->tr, 0, -2*h);
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Picture_render(f->tl, rend);
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Picture_render(f->tr, rend);
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}
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if (f->offset.x < f->tl->x1) {
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SWAP(f->tl, f->tr);
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SWAP(f->bl, f->br);
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Picture_move(f->tl, -2*w, 0);
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Picture_move(f->bl, -2*w, 0);
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Picture_render(f->tl, rend);
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Picture_render(f->bl, rend);
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}
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if (f->offset.y > f->br->y1) {
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SWAP(f->tl, f->bl);
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SWAP(f->tr, f->br);
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Picture_move(f->bl, 0, 2*h);
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Picture_move(f->br, 0, 2*h);
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Picture_render(f->bl, rend);
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Picture_render(f->br, rend);
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}
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if (f->offset.x > f->br->x1) {
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SWAP(f->tl, f->tr);
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SWAP(f->bl, f->br);
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Picture_move(f->tr, 2*w, 0);
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Picture_move(f->br, 2*w, 0);
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Picture_render(f->tr, rend);
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Picture_render(f->br, rend);
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}
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}
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void Field_draw(Field *f, SDL_Renderer *rend) {
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for (int i = 0; i < 4; i++) {
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Picture *p = f->pics[i];
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SDL_Rect dst = {
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p->x1 - f->offset.x, p->y1 - f->offset.y, p->w, p->h,
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};
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SDL_RenderCopy(rend, p->texture, NULL, &dst);
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}
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}
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int main() {
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int w = 1280, h = 720;
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@ -99,15 +167,9 @@ int main() {
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SDL_Texture *font = load_font(rend);
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Picture *pictures[4];
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enum { P_TOPLEFT, P_TOPRGHT, P_BOTLEFT, P_BOTRGHT };
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Field f;
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Field_init(&f, rend, w, h);
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pictures[P_TOPLEFT] = Picture_new(rend, 0, 0, w, h, 0xff7fffff);
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pictures[P_TOPRGHT] = Picture_new(rend, w, 0, w, h, 0xffff7fff);
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pictures[P_BOTLEFT] = Picture_new(rend, 0, h, w, h, 0xffffff7f);
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pictures[P_BOTRGHT] = Picture_new(rend, w, h, w, h, 0xff7fff7f);
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struct int2 off = { 0, 0 };
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struct int2 mouse_prev = { -1, -1 };
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int running = 1;
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while (running) {
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@ -116,72 +178,32 @@ int main() {
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break;
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}
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if (keys[SDL_SCANCODE_LEFT]) {
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off.x -= 16;
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f.offset.x -= 16;
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}
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if (keys[SDL_SCANCODE_RIGHT]) {
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off.x += 16;
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f.offset.x += 16;
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}
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if (keys[SDL_SCANCODE_UP]) {
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off.y -= 16;
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f.offset.y -= 16;
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}
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if (keys[SDL_SCANCODE_DOWN]) {
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off.y += 16;
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f.offset.y += 16;
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}
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struct int2 mouse;
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if (SDL_GetMouseState(&mouse.x, &mouse.y) & SDL_BUTTON(SDL_BUTTON_LEFT)) {
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if (mouse_prev.x != -1 ) {
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off.x -= mouse.x - mouse_prev.x;
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off.y -= mouse.y - mouse_prev.y;
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f.offset.x -= mouse.x - mouse_prev.x;
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f.offset.y -= mouse.y - mouse_prev.y;
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}
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mouse_prev = mouse;
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} else if (mouse_prev.x != -1) {
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mouse_prev = (struct int2) { -1, -1 };
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}
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if (off.y < pictures[P_TOPLEFT]->y1) {
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SWAP(pictures[P_TOPLEFT], pictures[P_BOTLEFT]);
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SWAP(pictures[P_TOPRGHT], pictures[P_BOTRGHT]);
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Picture_move(pictures[P_TOPLEFT], 0, -2*h);
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Picture_move(pictures[P_TOPRGHT], 0, -2*h);
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Picture_render(pictures[P_TOPLEFT], rend);
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Picture_render(pictures[P_TOPRGHT], rend);
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}
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if (off.x < pictures[P_TOPLEFT]->x1) {
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SWAP(pictures[P_TOPLEFT], pictures[P_TOPRGHT]);
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SWAP(pictures[P_BOTLEFT], pictures[P_BOTRGHT]);
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Picture_move(pictures[P_TOPLEFT], -2*w, 0);
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Picture_move(pictures[P_BOTLEFT], -2*w, 0);
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Picture_render(pictures[P_TOPLEFT], rend);
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Picture_render(pictures[P_BOTLEFT], rend);
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}
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if (off.y > pictures[P_BOTRGHT]->y1) {
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SWAP(pictures[P_TOPLEFT], pictures[P_BOTLEFT]);
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SWAP(pictures[P_TOPRGHT], pictures[P_BOTRGHT]);
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Picture_move(pictures[P_BOTLEFT], 0, 2*h);
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Picture_move(pictures[P_BOTRGHT], 0, 2*h);
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Picture_render(pictures[P_BOTLEFT], rend);
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Picture_render(pictures[P_BOTRGHT], rend);
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}
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if (off.x > pictures[P_BOTRGHT]->x1) {
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SWAP(pictures[P_TOPLEFT], pictures[P_TOPRGHT]);
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SWAP(pictures[P_BOTLEFT], pictures[P_BOTRGHT]);
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Picture_move(pictures[P_TOPRGHT], 2*w, 0);
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Picture_move(pictures[P_BOTRGHT], 2*w, 0);
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Picture_render(pictures[P_TOPRGHT], rend);
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Picture_render(pictures[P_BOTRGHT], rend);
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}
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Field_scroll(&f, rend);
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//SDL_SetRenderDrawColor(rend, 0, 0, 0, 255);
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//SDL_RenderClear(rend);
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for (int i = 0; i < 4; i++) {
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Picture *p = pictures[i];
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SDL_Rect dst = {
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p->x1 - off.x, p->y1 - off.y, w, h,
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};
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SDL_RenderCopy(rend, p->texture, NULL, &dst);
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}
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Field_draw(&f, rend);
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//char buf[72];
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//SDL_SetRenderDrawColor(rend, 0, 0, 0, 255);
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