DOlphin progress

src2/main.cpp

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+#include <gccore.h>
+#include "sdl_starter.h"
+#include "sdl_assets_loader.h"
+
+SDL_Window *window = nullptr;
+SDL_Renderer *renderer = nullptr;
+
+const int PLAYER_SPEED = 600;
+
+SDL_Rect player = {SCREEN_WIDTH / 2 - 64, SCREEN_HEIGHT / 2 - 64, 64, 64};
+
+SDL_Rect ball = {SCREEN_WIDTH / 2 + 50, SCREEN_HEIGHT / 2, 32, 32};
+
+int ballVelocityX = 400;
+int ballVelocityY = 400;
+
+int colorIndex;
+
+SDL_Color colors[] = {
+	{128, 128, 128, 0}, // gray
+	{255, 255, 255, 0}, // white
+	{255, 0, 0, 0},		// red
+	{0, 255, 0, 0},		// green
+	{0, 0, 255, 0},		// blue
+	{255, 255, 0, 0},	// brown
+	{0, 255, 255, 0},	// cyan
+	{255, 0, 255, 0},	// purple
+};
+
+void quitGame()
+{
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+	SDL_Quit();
+}
+
+void handleEvents()
+{
+	SDL_Event event;
+
+	while (SDL_PollEvent(&event))
+	{
+		if (event.type == SDL_QUIT)
+		{
+			quitGame();
+			exit(0);
+		}
+	}
+}
+
+int rand_range(int min, int max)
+{
+	return min + rand() / (RAND_MAX / (max - min + 1) + 1);
+}
+
+void update(float deltaTime)
+{
+	// PAD_ButtonsDown tells us which buttons were pressed in this loop
+	// this is a "one shot" state which will not fire again until the button has been released
+	const u32 padDown = PAD_ButtonsDown(0);
+
+	// PAD_ButtonsHeld tells us which buttons are keep pressing in this loop
+	const u32 padHeld = PAD_ButtonsHeld(0);
+
+	// We return to the launcher application via exit
+	if (padDown & PAD_BUTTON_START)
+		exit(0);
+
+	if (padHeld & PAD_BUTTON_LEFT && player.x > 0)
+	{
+		player.x -= PLAYER_SPEED * deltaTime;
+	}
+
+	else if (padHeld & PAD_BUTTON_RIGHT && player.x < SCREEN_WIDTH - player.w)
+	{
+		player.x += PLAYER_SPEED * deltaTime;
+	}
+
+	else if (padHeld & PAD_BUTTON_UP && player.y > 0)
+	{
+		player.y -= PLAYER_SPEED * deltaTime;
+	}
+
+	else if (padHeld & PAD_BUTTON_DOWN && player.y < SCREEN_HEIGHT - player.h)
+	{
+		player.y += PLAYER_SPEED * deltaTime;
+	}
+
+	if (ball.x < 0 || ball.x > SCREEN_WIDTH - ball.w)
+	{
+		ballVelocityX *= -1;
+
+		colorIndex = rand_range(0, 5);
+	}
+
+	else if (ball.y < 0 || ball.y > SCREEN_HEIGHT - ball.h)
+	{
+		ballVelocityY *= -1;
+
+		colorIndex = rand_range(0, 5);
+	}
+
+	else if (SDL_HasIntersection(&player, &ball))
+	{
+		ballVelocityX *= -1;
+		ballVelocityY *= -1;
+
+		colorIndex = rand_range(0, 5);
+	}
+
+	ball.x += ballVelocityX * deltaTime;
+	ball.y += ballVelocityY * deltaTime;
+}
+
+void render()
+{
+	SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+	SDL_RenderClear(renderer);
+
+	SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+
+	SDL_RenderFillRect(renderer, &player);
+
+	SDL_SetRenderDrawColor(renderer, colors[colorIndex].r, colors[colorIndex].g, colors[colorIndex].b, 255);
+
+	SDL_RenderFillRect(renderer, &ball);
+
+	SDL_RenderPresent(renderer);
+}
+
+int main(int argc, char **argv)
+{
+	window = SDL_CreateWindow("My Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
+	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
+
+	if (startSDL(window, renderer) > 0)
+	{
+		return 1;
+	}
+
+	Uint32 previousFrameTime = SDL_GetTicks();
+	Uint32 currentFrameTime = previousFrameTime;
+	float deltaTime = 0.0f;
+
+	PAD_Init();
+
+	while (true)
+	{
+		PAD_ScanPads();
+
+		currentFrameTime = SDL_GetTicks();
+		deltaTime = (currentFrameTime - previousFrameTime) / 1000.0f;
+		previousFrameTime = currentFrameTime;
+
+		handleEvents();
+		update(deltaTime);
+		render();
+	}
+}