From 4b88d9867b0fa6408ccb6182419fb5a7e4dbfbe4 Mon Sep 17 00:00:00 2001 From: unkl nik Date: Sun, 15 Oct 2023 20:02:24 +0200 Subject: [PATCH 1/2] Add Color Mix Example --- examples/shaders/multi_sample2d/color_mix.fs | 27 ++++++++ examples/shaders/multi_sample2d/main.go | 69 ++++++++++++++++++++ 2 files changed, 96 insertions(+) create mode 100644 examples/shaders/multi_sample2d/color_mix.fs create mode 100644 examples/shaders/multi_sample2d/main.go diff --git a/examples/shaders/multi_sample2d/color_mix.fs b/examples/shaders/multi_sample2d/color_mix.fs new file mode 100644 index 00000000..e794d32f --- /dev/null +++ b/examples/shaders/multi_sample2d/color_mix.fs @@ -0,0 +1,27 @@ +#version 330 + +// Input vertex attributes (from vertex shader) +in vec3 vertexPos; +in vec2 fragTexCoord; +in vec4 fragColor; + +// Input uniform values +uniform sampler2D texture0; +uniform sampler2D texture1; +uniform vec4 colDiffuse; + +uniform float divider = 0.5; + +out vec4 finalColor; + +void main() +{ + // Texel color fetching from texture sampler + vec4 texelColor0 = texture(texture0, fragTexCoord); + vec4 texelColor1 = texture(texture1, fragTexCoord); + + float x = fract(fragTexCoord.s); + float final = smoothstep(divider - 0.1, divider + 0.1, x); + + finalColor = mix(texelColor0, texelColor1, final); +} \ No newline at end of file diff --git a/examples/shaders/multi_sample2d/main.go b/examples/shaders/multi_sample2d/main.go new file mode 100644 index 00000000..6ebbc03b --- /dev/null +++ b/examples/shaders/multi_sample2d/main.go @@ -0,0 +1,69 @@ +package main + +import ( + rl "github.com/gen2brain/raylib-go/raylib" +) + +func main() { + screenWidth := int32(800) + screenHeight := int32(450) + + rl.SetConfigFlags(rl.FlagMsaa4xHint) // Enable Multi Sampling Anti Aliasing 4x (if available) + + rl.InitWindow(screenWidth, screenHeight, "raylib [shaders] example - multiple sample2D") + + imRed := rl.GenImageColor(int(screenWidth), int(screenHeight), rl.NewColor(uint8(255), uint8(0), uint8(0), uint8(255))) + texRed := rl.LoadTextureFromImage(imRed) + rl.UnloadImage(imRed) + + imBlue := rl.GenImageColor(int(screenWidth), int(screenHeight), rl.NewColor(uint8(0), uint8(0), uint8(255), uint8(255))) + texBlue := rl.LoadTextureFromImage(imBlue) + rl.UnloadImage(imBlue) + + shader := rl.LoadShader("", "color_mix.fs") + + texBlueLoc := rl.GetShaderLocation(shader, "texture1") + dividerLoc := rl.GetShaderLocation(shader, "divider") + dividerValue := []float32{0.5} + + rl.SetTargetFPS(60) + + for !rl.WindowShouldClose() { + + if rl.IsKeyDown(rl.KeyRight) { + dividerValue[0] += 0.01 + } else if rl.IsKeyDown(rl.KeyLeft) { + dividerValue[0] -= 0.01 + } + + if dividerValue[0] < 0 { + dividerValue[0] = 0 + } else if dividerValue[0] > 1 { + dividerValue[0] = 1 + } + + rl.SetShaderValue(shader, dividerLoc, dividerValue, rl.ShaderUniformFloat) + + rl.BeginDrawing() + + rl.ClearBackground(rl.RayWhite) + + rl.BeginShaderMode(shader) + + rl.SetShaderValueTexture(shader, texBlueLoc, texBlue) + rl.DrawTexture(texRed, 0, 0, rl.White) + + rl.EndShaderMode() + + rl.DrawText("USE LEFT/RIGHT ARROW KEYS TO MIX COLORS", 15, 17, 20, rl.Black) + rl.DrawText("USE LEFT/RIGHT ARROW KEYS TO MIX COLORS", 16, 16, 20, rl.White) + + rl.EndDrawing() + } + + rl.UnloadShader(shader) // Unload shader + rl.UnloadTexture(texRed) // Unload texture + rl.UnloadTexture(texBlue) // Unload texture + + rl.CloseWindow() +} From 3e96c7e9dfdae369f8893aff6a456ff4d901fe13 Mon Sep 17 00:00:00 2001 From: unkl nik Date: Tue, 17 Oct 2023 19:46:08 +0200 Subject: [PATCH 2/2] add more Core examples --- examples/core/basic_window_manager/main.go | 106 +++++++++++++++++++++ examples/core/smooth_pixelperfect/main.go | 85 +++++++++++++++++ 2 files changed, 191 insertions(+) create mode 100644 examples/core/basic_window_manager/main.go create mode 100644 examples/core/smooth_pixelperfect/main.go diff --git a/examples/core/basic_window_manager/main.go b/examples/core/basic_window_manager/main.go new file mode 100644 index 00000000..a61550b9 --- /dev/null +++ b/examples/core/basic_window_manager/main.go @@ -0,0 +1,106 @@ +package main + +import ( + "fmt" + + rl "github.com/gen2brain/raylib-go/raylib" +) + +const screenW = int32(1280) +const screenH = int32(720) + +type gameScreen int + +const ( + LOGO = iota + TITLE + GAMEPLAY + ENDING +) + +func main() { + + rl.InitWindow(screenW, screenH, "raylib [core] example - basic screen manager") + + var currentScreen gameScreen + currentScreen = LOGO + frames := 0 + + rl.SetTargetFPS(60) + + for !rl.WindowShouldClose() { + + switch currentScreen { + case LOGO: + frames++ + if frames > 240 { + currentScreen = TITLE + } + case TITLE: + if rl.IsKeyPressed(rl.KeyEnter) { + currentScreen = GAMEPLAY + } + case GAMEPLAY: + if rl.IsKeyPressed(rl.KeyEnter) { + currentScreen = ENDING + } + case ENDING: + if rl.IsKeyPressed(rl.KeyEnter) { + currentScreen = LOGO + frames = 0 + } + } + + rl.BeginDrawing() + + rl.ClearBackground(rl.Black) + rec := rl.NewRectangle(0, 0, float32(screenW), float32(screenH)) + switch currentScreen { + case LOGO: + txt := "YOUR LOGO GOES HERE" + txtlen := rl.MeasureText(txt, 50) + rl.DrawText(txt, screenW/2-txtlen/2-3, screenH/2-50+3, 50, rl.Magenta) + rl.DrawText(txt, screenW/2-txtlen/2-1, screenH/2-50+1, 50, rl.Black) + rl.DrawText(txt, screenW/2-txtlen/2, screenH/2-50, 50, rl.White) + txt = "this message disappears in " + fmt.Sprint(240-frames) + " frames" + txtlen = rl.MeasureText(txt, 30) + rl.DrawText(txt, screenW/2-txtlen/2-3, screenH/2+3, 30, rl.Magenta) + rl.DrawText(txt, screenW/2-txtlen/2-1, screenH/2+1, 30, rl.Black) + rl.DrawText(txt, screenW/2-txtlen/2, screenH/2, 30, rl.White) + case TITLE: + rl.DrawRectangleRec(rec, rl.DarkGreen) + txt := "AN AMAZING TITLE GOES HERE" + txtlen := rl.MeasureText(txt, 50) + rl.DrawText(txt, screenW/2-txtlen/2-2, screenH/2-50+2, 50, rl.Black) + rl.DrawText(txt, screenW/2-txtlen/2, screenH/2-50, 50, rl.White) + txt = "press enter to move to next screen" + txtlen = rl.MeasureText(txt, 30) + rl.DrawText(txt, screenW/2-txtlen/2-2, screenH/2+2, 30, rl.Black) + rl.DrawText(txt, screenW/2-txtlen/2, screenH/2, 30, rl.White) + case GAMEPLAY: + rl.DrawRectangleRec(rec, rl.DarkPurple) + txt := "FUN GAMEPLAY GOES HERE" + txtlen := rl.MeasureText(txt, 50) + rl.DrawText(txt, screenW/2-txtlen/2-2, screenH/2-50+2, 50, rl.Black) + rl.DrawText(txt, screenW/2-txtlen/2, screenH/2-50, 50, rl.White) + txt = "press enter to move to next screen" + txtlen = rl.MeasureText(txt, 30) + rl.DrawText(txt, screenW/2-txtlen/2-2, screenH/2+2, 30, rl.Black) + rl.DrawText(txt, screenW/2-txtlen/2, screenH/2, 30, rl.White) + case ENDING: + rl.DrawRectangleRec(rec, rl.DarkBlue) + txt := "A DRAMATIC ENDING GOES HERE" + txtlen := rl.MeasureText(txt, 50) + rl.DrawText(txt, screenW/2-txtlen/2-2, screenH/2-50+2, 50, rl.Black) + rl.DrawText(txt, screenW/2-txtlen/2, screenH/2-50, 50, rl.White) + txt = "press enter to move to next screen" + txtlen = rl.MeasureText(txt, 30) + rl.DrawText(txt, screenW/2-txtlen/2-2, screenH/2+2, 30, rl.Black) + rl.DrawText(txt, screenW/2-txtlen/2, screenH/2, 30, rl.White) + } + + rl.EndDrawing() + } + + rl.CloseWindow() +} diff --git a/examples/core/smooth_pixelperfect/main.go b/examples/core/smooth_pixelperfect/main.go new file mode 100644 index 00000000..e6b0f66b --- /dev/null +++ b/examples/core/smooth_pixelperfect/main.go @@ -0,0 +1,85 @@ +package main + +import ( + "fmt" + "math" + + rl "github.com/gen2brain/raylib-go/raylib" +) + +const screenW = int32(1280) +const screenH = int32(720) +const virtualScreenW = screenW / 5 +const virtualScreenH = screenH / 5 +const virtualRatio = float32(screenW) / float32(virtualScreenW) + +func main() { + + rl.InitWindow(screenW, screenH, "raylib [core] example - smooth pixel-perfect camera") + + worldSpaceCam := rl.Camera2D{} + worldSpaceCam.Zoom = 1 + + screenSpaceCam := rl.Camera2D{} + screenSpaceCam.Zoom = 1 + + target := rl.LoadRenderTexture(virtualScreenW, virtualScreenH) + + rec1 := rl.NewRectangle(120, 60, 80, 40) + rec2 := rl.NewRectangle(130, 70, 90, 30) + rec3 := rl.NewRectangle(140, 80, 65, 45) + + sourceRec := rl.NewRectangle(0, 0, float32(target.Texture.Width), -float32(target.Texture.Height)) + destRec := rl.NewRectangle(-virtualRatio, -virtualRatio, float32(screenW)+(virtualRatio*2), float32(screenH)+(virtualRatio*2)) + + origin := rl.NewVector2(0, 0) + + rotation, camX, camY := float32(0), float32(0), float32(0) + + rl.SetTargetFPS(60) + + for !rl.WindowShouldClose() { + + rotation += 60 * rl.GetFrameTime() + + camX = float32(math.Sin(rl.GetTime()) * 50) + camY = float32(math.Cos(rl.GetTime()) * 30) + + screenSpaceCam.Target = rl.NewVector2(camX, camY) + + worldSpaceCam.Target.X = screenSpaceCam.Target.X + screenSpaceCam.Target.X -= worldSpaceCam.Target.X + screenSpaceCam.Target.X *= virtualRatio + + worldSpaceCam.Target.Y = screenSpaceCam.Target.Y + screenSpaceCam.Target.Y -= worldSpaceCam.Target.Y + screenSpaceCam.Target.Y *= virtualRatio + + rl.BeginTextureMode(target) + rl.ClearBackground(rl.RayWhite) + rl.BeginMode2D(worldSpaceCam) + + rl.DrawRectanglePro(rec1, origin, rotation, rl.Black) + rl.DrawRectanglePro(rec2, origin, -rotation, rl.Red) + rl.DrawRectanglePro(rec3, origin, rotation+45, rl.Blue) + + rl.EndMode2D() + rl.EndTextureMode() + + rl.BeginDrawing() + rl.ClearBackground(rl.Red) + rl.BeginMode2D(screenSpaceCam) + rl.DrawTexturePro(target.Texture, sourceRec, destRec, origin, 0, rl.White) + rl.EndMode2D() + + rl.DrawText("screen res "+fmt.Sprint(screenW)+"x"+fmt.Sprint(screenH), 10, 10, 20, rl.Black) + rl.DrawText("world res "+fmt.Sprint(virtualScreenW)+"x"+fmt.Sprint(virtualScreenH), 10, 30, 20, rl.Black) + rl.DrawFPS(screenW-100, 10) + + rl.EndDrawing() + } + + rl.UnloadRenderTexture(target) + + rl.CloseWindow() +}