98 lines
2.9 KiB
Go
98 lines
2.9 KiB
Go
/*******************************************************************************************
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*
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* raylib [textures] example - Sprite animation
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*
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* Example originally created with raylib 1.3, last time updated with raylib 1.3
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2014-2024 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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package main
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import (
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"fmt"
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rl "github.com/gen2brain/raylib-go/raylib"
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)
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const (
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screenWidth = 800
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screenHeight = 450
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maxFramesSpeed = 15
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minFramesSpeed = 1
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)
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func main() {
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rl.InitWindow(screenWidth, screenHeight, "raylib [texture] example - sprite anim")
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// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
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scarfy := rl.LoadTexture("scarfy.png") // Texture loading
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position := rl.Vector2{X: 350.0, Y: 280.0}
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frameRec := rl.Rectangle{Width: float32(scarfy.Width / 6), Height: float32(scarfy.Height)}
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var currentFrame, framesCounter, framesSpeed int32 = 0, 0, 8
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rl.SetTargetFPS(60) // Set our game to run at 60 frames-per-second
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// Main game loop
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for !rl.WindowShouldClose() { // Detect window close button or ESC key
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framesCounter++
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if framesCounter >= (60 / framesSpeed) {
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framesCounter = 0
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currentFrame++
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if currentFrame > 5 {
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currentFrame = 0
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}
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frameRec.X = float32(currentFrame*scarfy.Width) / 6
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}
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// Control frames speed
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if rl.IsKeyPressed(rl.KeyRight) {
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framesSpeed++
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} else if rl.IsKeyPressed(rl.KeyLeft) {
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framesSpeed--
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}
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// Make sure that framesSpeed is between minFramesSpeed and maxFramesSpeed
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framesSpeed = clamp(framesSpeed, minFramesSpeed, maxFramesSpeed)
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// Draw
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rl.BeginDrawing()
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rl.ClearBackground(rl.RayWhite)
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rl.DrawTexture(scarfy, 15, 40, rl.White)
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rl.DrawRectangleLines(15, 40, scarfy.Width, scarfy.Height, rl.Lime)
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rl.DrawRectangleLines(15+int32(frameRec.X), 40+int32(frameRec.Y), int32(frameRec.Width), int32(frameRec.Height), rl.Red)
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rl.DrawText("FRAME SPEED: ", 165, 210, 10, rl.DarkGray)
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rl.DrawText(fmt.Sprintf("%02d FPS", framesSpeed), 575, 210, 10, rl.DarkGray)
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rl.DrawText("PRESS RIGHT/LEFT KEYS to CHANGE SPEED!", 290, 240, 10, rl.DarkGray)
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for i := int32(0); i < maxFramesSpeed; i++ {
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if i < framesSpeed {
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rl.DrawRectangle(250+21*i, 205, 20, 20, rl.Red)
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}
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rl.DrawRectangleLines(250+21*i, 205, 20, 20, rl.Maroon)
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}
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rl.DrawTextureRec(scarfy, frameRec, position, rl.White) // Draw part of the texture
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rl.DrawText("(c) Scarfy sprite by Eiden Marsal", screenWidth-200, screenHeight-20, 10, rl.Gray)
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rl.EndDrawing()
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}
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// De-Initialization
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rl.UnloadTexture(scarfy) // Texture unloading
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rl.CloseWindow() // Close window and OpenGL context
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}
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func clamp(value, minValue, maxValue int32) int32 {
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return max(minValue, min(value, maxValue))
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}
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