From 5bf50a5c5bff230a0d2d8c4fb90184ed0c991387 Mon Sep 17 00:00:00 2001
From: Per Hultqvist <per@hultqvist.nu>
Date: Mon, 14 Oct 2024 18:17:15 +0200
Subject: [PATCH] Synced up another raylib-go example with raylib:s example

---
 examples/core/3d_camera_splitscreen/main.go | 61 ++++++++++-----------
 1 file changed, 29 insertions(+), 32 deletions(-)

diff --git a/examples/core/3d_camera_splitscreen/main.go b/examples/core/3d_camera_splitscreen/main.go
index dd34697..22181d1 100644
--- a/examples/core/3d_camera_splitscreen/main.go
+++ b/examples/core/3d_camera_splitscreen/main.go
@@ -7,7 +7,6 @@ import (
 var (
 	screenW    = int32(800)
 	screenH    = int32(450)
-	playerSize = float32(40)
 	cam1, cam2 rl.Camera3D
 )
 
@@ -15,67 +14,63 @@ func main() {
 
 	rl.InitWindow(screenW, screenH, "raylib [core] example - 3d camera split screen")
 
+	// Setup player 1 camera and screen
 	cam1.Fovy = 45
 	cam1.Up.Y = 1
 	cam1.Target.Y = 1
 	cam1.Position.Z = -3
-	cam1.Position.Y = 0.5
+	cam1.Position.Y = 1
 
-	cam2 = cam1
-	cam1.Position.Z = 3
+	// Setup player two camera and screen
+	cam2.Fovy = 45
+	cam2.Up.Y = 1
+	cam2.Target.Y = 3
+	cam2.Position.X = -3
+	cam2.Position.Y = 3
 
 	screenCam1 := rl.LoadRenderTexture(screenW/2, screenH)
 	screenCam2 := rl.LoadRenderTexture(screenW/2, screenH)
 
 	splitScreenRec := rl.NewRectangle(0, 0, float32(screenCam1.Texture.Width), -float32(screenCam1.Texture.Height))
 
-	count := 5
+	count := float32(5)
 	spacing := float32(4)
 
 	rl.SetTargetFPS(60)
 
 	for !rl.WindowShouldClose() {
-
+		// If anyone moves this frame, how far will they move based on the time
+		// since the last frame this moves things at 10 world units per second,
+		// regardless of the actual FPS
 		frameOffset := 10 * rl.GetFrameTime()
 
+		// Move Player1 forward and backwards (no turning)
 		if rl.IsKeyDown(rl.KeyW) {
-			cam1.Position.Z -= frameOffset
-			cam1.Target.Z -= frameOffset
-		} else if rl.IsKeyDown(rl.KeyS) {
 			cam1.Position.Z += frameOffset
 			cam1.Target.Z += frameOffset
-		}
-		if rl.IsKeyDown(rl.KeyD) {
-			cam1.Position.X += frameOffset
-			cam1.Target.X += frameOffset
-		} else if rl.IsKeyDown(rl.KeyA) {
-			cam1.Position.X -= frameOffset
-			cam1.Target.X -= frameOffset
+		} else if rl.IsKeyDown(rl.KeyS) {
+			cam1.Position.Z -= frameOffset
+			cam1.Target.Z -= frameOffset
 		}
 
+		// Move Player2 forward and backwards (no turning)
 		if rl.IsKeyDown(rl.KeyUp) {
-			cam2.Position.Z += frameOffset
-			cam2.Target.Z += frameOffset
-		} else if rl.IsKeyDown(rl.KeyDown) {
-			cam2.Position.Z -= frameOffset
-			cam2.Target.Z -= frameOffset
-		}
-		if rl.IsKeyDown(rl.KeyRight) {
-			cam2.Position.X -= frameOffset
-			cam2.Target.X -= frameOffset
-		} else if rl.IsKeyDown(rl.KeyLeft) {
 			cam2.Position.X += frameOffset
 			cam2.Target.X += frameOffset
+		} else if rl.IsKeyDown(rl.KeyDown) {
+			cam2.Position.X -= frameOffset
+			cam2.Target.X -= frameOffset
 		}
 
+		// Draw Player1 view to the render texture
 		rl.BeginTextureMode(screenCam1)
 		rl.ClearBackground(rl.SkyBlue)
 		rl.BeginMode3D(cam1)
 
 		rl.DrawPlane(rl.Vector3Zero(), rl.NewVector2(50, 50), rl.Beige)
 
-		for x := -float32(count) * spacing; x <= float32(count)*spacing; x += spacing {
-			for z := -float32(count) * spacing; z <= float32(count)*spacing; z += spacing {
+		for x := -count * spacing; x <= count*spacing; x += spacing {
+			for z := -count * spacing; z <= count*spacing; z += spacing {
 				rl.DrawCube(rl.NewVector3(x-0.5, 1.5, z), 1, 1, 1, rl.Lime)
 				rl.DrawCube(rl.NewVector3(x-0.5, 0.5, z), 0.25, 1, 0.25, rl.Brown)
 			}
@@ -87,17 +82,18 @@ func main() {
 		rl.EndMode3D()
 
 		rl.DrawRectangle(0, 0, screenW/2, 40, rl.Fade(rl.RayWhite, 0.8))
-		rl.DrawText("PLAYER 1 WASD KEYS", 10, 10, 20, rl.Maroon)
+		rl.DrawText("PLAYER1: W/S to move", 10, 10, 20, rl.Maroon)
 		rl.EndTextureMode()
 
+		// Draw Player2 view to the render texture
 		rl.BeginTextureMode(screenCam2)
 		rl.ClearBackground(rl.SkyBlue)
 		rl.BeginMode3D(cam2)
 
 		rl.DrawPlane(rl.Vector3Zero(), rl.NewVector2(50, 50), rl.Beige)
 
-		for x := -float32(count) * spacing; x <= float32(count)*spacing; x += spacing {
-			for z := -float32(count) * spacing; z <= float32(count)*spacing; z += spacing {
+		for x := -count * spacing; x <= count*spacing; x += spacing {
+			for z := -count * spacing; z <= count*spacing; z += spacing {
 				rl.DrawCube(rl.NewVector3(x, 1.5, z), 1, 1, 1, rl.Lime)
 				rl.DrawCube(rl.NewVector3(x, 0.5, z), 0.25, 1, 0.25, rl.Brown)
 			}
@@ -109,9 +105,10 @@ func main() {
 		rl.EndMode3D()
 
 		rl.DrawRectangle(0, 0, screenW/2, 40, rl.Fade(rl.RayWhite, 0.8))
-		rl.DrawText("PLAYER 2 ARROW KEYS", 10, 10, 20, rl.Maroon)
+		rl.DrawText("PLAYER2: UP/DOWN to move", 10, 10, 20, rl.Maroon)
 		rl.EndTextureMode()
 
+		// Draw both views render textures to the screen side by side
 		rl.BeginDrawing()
 		rl.ClearBackground(rl.Black)