87 lines
3.8 KiB
C
87 lines
3.8 KiB
C
/*******************************************************************************************
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*
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* raylib [textures] example - Background scrolling
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*
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* This example has been created using raylib 2.0 (www.raylib.com)
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* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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*
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* Copyright (c) 2019 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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#include "raylib.h"
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int main(void)
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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const int screenWidth = 800;
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const int screenHeight = 450;
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InitWindow(screenWidth, screenHeight, "raylib [textures] example - background scrolling");
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// NOTE: Be careful, background width must be equal or bigger than screen width
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// if not, texture should be draw more than two times for scrolling effect
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Texture2D background = LoadTexture("resources/cyberpunk_street_background.png");
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Texture2D midground = LoadTexture("resources/cyberpunk_street_midground.png");
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Texture2D foreground = LoadTexture("resources/cyberpunk_street_foreground.png");
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float scrollingBack = 0.0f;
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float scrollingMid = 0.0f;
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float scrollingFore = 0.0f;
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//----------------------------------------------------------------------------------
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scrollingBack -= 0.1f;
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scrollingMid -= 0.5f;
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scrollingFore -= 1.0f;
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// NOTE: Texture is scaled twice its size, so it sould be considered on scrolling
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if (scrollingBack <= -background.width*2) scrollingBack = 0;
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if (scrollingMid <= -midground.width*2) scrollingMid = 0;
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if (scrollingFore <= -foreground.width*2) scrollingFore = 0;
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(GetColor(0x052c46ff));
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// Draw background image twice
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// NOTE: Texture is scaled twice its size
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DrawTextureEx(background, (Vector2){ scrollingBack, 20 }, 0.0f, 2.0f, WHITE);
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DrawTextureEx(background, (Vector2){ background.width*2 + scrollingBack, 20 }, 0.0f, 2.0f, WHITE);
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// Draw midground image twice
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DrawTextureEx(midground, (Vector2){ scrollingMid, 20 }, 0.0f, 2.0f, WHITE);
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DrawTextureEx(midground, (Vector2){ midground.width*2 + scrollingMid, 20 }, 0.0f, 2.0f, WHITE);
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// Draw foreground image twice
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DrawTextureEx(foreground, (Vector2){ scrollingFore, 70 }, 0.0f, 2.0f, WHITE);
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DrawTextureEx(foreground, (Vector2){ foreground.width*2 + scrollingFore, 70 }, 0.0f, 2.0f, WHITE);
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DrawText("BACKGROUND SCROLLING & PARALLAX", 10, 10, 20, RED);
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DrawText("(c) Cyberpunk Street Environment by Luis Zuno (@ansimuz)", screenWidth - 330, screenHeight - 20, 10, RAYWHITE);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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UnloadTexture(background); // Unload background texture
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UnloadTexture(midground); // Unload midground texture
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UnloadTexture(foreground); // Unload foreground texture
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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} |