142 lines
5.1 KiB
C
142 lines
5.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#define NOB_REALLOC realloc
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#define NOB_ASSERT assert
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// Initial capacity of a dynamic array
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#define NOB_DA_INIT_CAP 256
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// Append an item to a dynamic array
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#define nob_da_append(da, item) \
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do { \
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if ((da)->count >= (da)->capacity) { \
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(da)->capacity = (da)->capacity == 0 ? NOB_DA_INIT_CAP : (da)->capacity*2; \
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(da)->items = NOB_REALLOC((da)->items, (da)->capacity*sizeof(*(da)->items)); \
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NOB_ASSERT((da)->items != NULL && "Buy more RAM lol"); \
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} \
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\
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(da)->items[(da)->count++] = (item); \
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} while (0)
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#include "raylib.h"
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#include "raymath.h"
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#define PLAYER_SPEED 1000
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#define REAL_FPS 30
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#define TARGET_FPS 480
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#define TARGET_DT (1.0/TARGET_FPS)
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#define GRAVITY 1000.0f
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#define COLLISION_DAMPING 0.8
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typedef struct {
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Vector2 *items;
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size_t count;
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size_t capacity;
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} Vector2s;
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typedef struct {
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Color *items;
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size_t count;
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size_t capacity;
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} Colors;
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Texture tex_rac;
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int win_fun()
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{
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SetWindowState(FLAG_WINDOW_RESIZABLE);
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#ifdef RELEASE
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ShowCursor();
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EnableCursor();
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#endif
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#ifdef RELEASE
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SetWindowSize(690, 690);
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#else
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SetWindowSize(1600, 900);
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#endif
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SetTargetFPS(REAL_FPS);
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Vector2s positions = {0};
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Vector2s velocities = {0};
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Colors colors = {0};
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#ifdef RELEASE
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#include "assets/raccon-delicieu.h"
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Image img_rac = LoadImageFromMemory(".png", raccoon_data, raccoon_size);
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tex_rac = LoadTextureFromImage(img_rac);
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#else
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tex_rac = LoadTexture("assets/raccon-delicieu.png");
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#endif
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Vector2 prev_winpos = GetWindowPosition();
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while (!WindowShouldClose()) {
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Vector2 winpos = GetWindowPosition();
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Vector2 dwinpos = Vector2Subtract(winpos, prev_winpos);
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float w = GetScreenWidth();
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float h = GetScreenHeight();
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float real_dt = GetFrameTime();
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float radius = 40.0f;
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BeginDrawing();
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ClearBackground(GetColor(0x181818FF));
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if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
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nob_da_append(&positions, GetMousePosition());
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float angle = DEG2RAD*GetRandomValue(0, 360);
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Vector2 dir = {500*cosf(angle), 500*sinf(angle)};
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nob_da_append(&velocities, dir);
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nob_da_append(&colors, ColorFromHSV(GetRandomValue(0, 360), 1, 1));
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}
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for (float t = 0.0; t < real_dt; t += TARGET_DT) {
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for (size_t i = 0; i < positions.count; ++i) {
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float f = t/real_dt;
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positions.items[i] = Vector2Subtract(positions.items[i], Vector2Scale(dwinpos, TARGET_DT/real_dt));
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velocities.items[i].y += GRAVITY*TARGET_DT;
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float nx = positions.items[i].x + velocities.items[i].x*TARGET_DT;
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if (nx - radius <= 0) {
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positions.items[i].x = radius;
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velocities.items[i].x *= -COLLISION_DAMPING;
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velocities.items[i].x += dwinpos.x*TARGET_DT/real_dt*300;
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} else if (nx + radius >= w) {
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positions.items[i].x = w - radius;
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velocities.items[i].x *= -COLLISION_DAMPING;
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velocities.items[i].x += dwinpos.x*TARGET_DT/real_dt*300;
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} else {
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positions.items[i].x = nx;
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}
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float ny = positions.items[i].y + velocities.items[i].y*TARGET_DT;
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if (ny - radius <= 0) {
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positions.items[i].y = radius;
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velocities.items[i].y *= -COLLISION_DAMPING;
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velocities.items[i].y += dwinpos.y*TARGET_DT/real_dt*300;
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} else if (ny + radius >= h) {
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positions.items[i].y = h - radius;
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velocities.items[i].y *= -COLLISION_DAMPING;
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velocities.items[i].y += dwinpos.y*TARGET_DT/real_dt*300;
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} else {
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positions.items[i].y = ny;
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}
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// DrawRing(positions.items[i], radius*0.8, radius, 0, 360, 100, ColorAlpha(colors.items[i], f));
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DrawTexturePro(
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tex_rac,
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(Rectangle) {0, 0, tex_rac.width, tex_rac.height},
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(Rectangle) {positions.items[i].x-radius, positions.items[i].y-radius, radius*2, radius*2},
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(Vector2) {0, 0},
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0.0f,
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ColorAlpha(colors.items[i], f)
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);
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}
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}
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EndDrawing();
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prev_winpos = winpos;
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}
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CloseWindow();
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return 0;
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}
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