环境
- Time 2024-02-29
- Zig 0.12.0-dev.3076+6e078883e
- WSL-Ubuntu 22.04.3 LTS
- Raylib 5.0
前言
说明
参考资料：
- https://www.raylib.com/examples.html
目标
实现不同的混合模式。
main.zig
const std = @import("std");
const ray = @import("raylib.zig");pub fn main() !void {const screenWidth: c_int = 800;const screenHeight: c_int = 450;ray.InitWindow(screenWidth, screenHeight, "raylib [shapes] example");defer ray.CloseWindow();ray.SetTargetFPS(60);const background = ray.LoadTexture("res/cyberpunk_street_background.png");defer ray.UnloadTexture(background);const foreground = ray.LoadTexture("res/cyberpunk_street_foreground.png");defer ray.UnloadTexture(foreground);const blendCountMax = 4;var blendMode: ray.BlendMode = 0;while (!ray.WindowShouldClose()) {// Updateif (ray.IsKeyPressed(ray.KEY_SPACE)) {if (blendMode >= (blendCountMax - 1)) blendMode = 0 else blendMode += 1;}// Drawray.BeginDrawing();defer ray.EndDrawing();ray.ClearBackground(ray.RAYWHITE);var x = @divTrunc(screenWidth, 2) - @divTrunc(background.width, 2);var y = @divTrunc(screenHeight, 2) - @divTrunc(background.height, 2);ray.DrawTexture(background, x, y, ray.WHITE);// Apply the blend mode and then draw the foreground textureray.BeginBlendMode(@intCast(blendMode));x = @divTrunc(screenWidth, 2) - @divTrunc(foreground.width, 2);y = @divTrunc(screenHeight, 2) - @divTrunc(foreground.height, 2);ray.DrawTexture(foreground, x, y, ray.WHITE);ray.EndBlendMode();// Draw the textsray.DrawText("Press SPACE to change blend modes.", 310, 350, 10, ray.GRAY);switch (blendMode) {ray.BLEND_ALPHA => ray.DrawText("Current: BLEND_ALPHA", (screenWidth / 2) - 60, 370, 10, ray.GRAY),ray.BLEND_ADDITIVE => ray.DrawText("Current: BLEND_ADDITIVE", (screenWidth / 2) - 60, 370, 10, ray.GRAY),ray.BLEND_MULTIPLIED => ray.DrawText("Current: BLEND_MULTIPLIED", (screenWidth / 2) - 60, 370, 10, ray.GRAY),ray.BLEND_ADD_COLORS => ray.DrawText("Current: BLEND_ADD_COLORS", (screenWidth / 2) - 60, 370, 10, ray.GRAY),else => {},}const text = "(c) Cyberpunk Street Environment by Luis Zuno (@ansimuz)";ray.DrawText(text, screenWidth - 330, screenHeight - 20, 10, ray.GRAY);ray.DrawFPS(screenWidth - 100, 10);}
}
图片：https://github.com/raysan5/raylib/blob/master/examples/textures/resources/
效果
总结
实现不同的混合模式。