add random stuffs

graphics2d.hpp

@@ -0,0 +1,106 @@
+#pragma once
+
+#include <SDL2/SDL.h>
+
+struct RGBColor {
+    uint8_t r = 255;
+    uint8_t g = 255;
+    uint8_t b = 255;
+};
+
+class Window {
+    SDL_Window* window;
+    SDL_Renderer* renderer;
+public:
+    Window(const char* name, const int w, const int h) {
+        if (SDL_Init(SDL_INIT_EVERYTHING) < 0 ||
+            !((window = SDL_CreateWindow(name, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, w, h, SDL_WINDOW_SHOWN))) ||
+            !((renderer = SDL_CreateRenderer(window, -1, 0)))
+        ) exit(1);
+    }
+
+    void scale(const float x, const float y) const {
+        SDL_RenderSetScale(renderer, x, y);
+    }
+
+    void close() const {
+        SDL_DestroyRenderer(renderer);
+        SDL_DestroyWindow(window);
+        SDL_Quit();
+        exit(0);
+    }
+
+    void rect(const int x, const int y, const int w, const int h, const RGBColor c) const {
+        SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+        SDL_Rect rect_ = {x, y, w, h};
+        SDL_RenderFillRect(renderer, &rect_);
+    }
+
+    void pixel(const int x, const int y, const RGBColor c) const {
+        SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+        SDL_RenderDrawPoint(renderer, x, y);
+    }
+
+    void circle(const int x, const int y, const int radius, const RGBColor c) const {
+        for (int i = 0; i < radius*2; i++) {
+            for (int j = 0; j < radius*2; j++) {
+                int dx = i - radius;
+                int dy = j - radius;
+                int distance = dx * dx + dy * dy;
+
+                if ((radius - 1) * (radius - 1) <= distance && distance <= radius * radius) {
+                    pixel(x - radius + i, y - radius + j, c);
+                }
+            }
+        }
+    }
+
+    void line(const int x1, const int y1, const int x2, const int y2, const RGBColor c) const {
+        SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+        SDL_RenderDrawLine(renderer, x1, y1, x2, y2);
+    }
+
+    void rect_outline(const int x1, const int y1, const int w, const int h, const RGBColor c) const {
+        line(x1,     y1,     x1 + w, y1,     c);
+        line(x1 + w, y1,     x1 + w, y1 + h, c);
+        line(x1 + w, y1 + h, x1,     y1 + h, c);
+        line(x1,     y1 + h, x1,     y1,     c);
+    }
+
+    void input() const {
+        SDL_Event e;
+        while (SDL_PollEvent(&e)) {
+            if (e.type == SDL_QUIT) {
+                this->close();
+            }
+        }
+    }
+
+    void render(const unsigned int ms) const {
+        SDL_RenderPresent(renderer);
+        SDL_Delay(ms);
+    }
+
+    void clear(const RGBColor c) const {
+        SDL_SetRenderDrawColor(renderer, c.r, c.g, c.b, 255);
+        SDL_RenderClear(renderer);
+    }
+};
+
+/*
+old line() code because i dont want to lose it:
+
+int dx = x2 - x1;
+int dy = y2 - y1;
+float length = sqrt(dx * dx + dy * dy);
+
+for (int i = 0; i <= length; i++) {
+    int x = x1;
+    int y = y1;
+    if (length > 0) {
+        x += i * dx / length;
+        y += i * dy / length;
+    }
+    pixel(x, y, c);
+}
+*/