Initial commit

examples/core/3d_picking/main.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	screenWidth := int32(800)
+	screenHeight := int32(450)
+
+	raylib.InitWindow(screenWidth, screenHeight, "raylib [core] example - 3d picking")
+
+	camera := raylib.Camera{}
+	camera.Position = raylib.NewVector3(10.0, 10.0, 10.0)
+	camera.Target = raylib.NewVector3(0.0, 0.0, 0.0)
+	camera.Up = raylib.NewVector3(0.0, 1.0, 0.0)
+	camera.Fovy = 45.0
+
+	cubePosition := raylib.NewVector3(0.0, 1.0, 0.0)
+	cubeSize := raylib.NewVector3(2.0, 2.0, 2.0)
+
+	var ray raylib.Ray
+
+	collision := false
+
+	raylib.SetCameraMode(camera, raylib.CameraFree) // Set a free camera mode
+
+	raylib.SetTargetFPS(60)
+
+	for !raylib.WindowShouldClose() {
+		raylib.UpdateCamera(&camera) // Update camera
+
+		if raylib.IsMouseButtonPressed(raylib.MouseLeftButton) {
+			// NOTE: This function is NOT WORKING properly!
+			ray = raylib.GetMouseRay(raylib.GetMousePosition(), camera)
+
+			// Check collision between ray and box
+			min := raylib.NewVector3(cubePosition.X-cubeSize.X/2, cubePosition.Y-cubeSize.Y/2, cubePosition.Z-cubeSize.Z/2)
+			max := raylib.NewVector3(cubePosition.X+cubeSize.X/2, cubePosition.Y+cubeSize.Y/2, cubePosition.Z+cubeSize.Z/2)
+			collision = raylib.CheckCollisionRayBox(ray, raylib.NewBoundingBox(min, max))
+		}
+
+		raylib.BeginDrawing()
+
+		raylib.ClearBackground(raylib.RayWhite)
+
+		raylib.Begin3dMode(camera)
+
+		if collision {
+			raylib.DrawCube(cubePosition, cubeSize.X, cubeSize.Y, cubeSize.Z, raylib.Red)
+			raylib.DrawCubeWires(cubePosition, cubeSize.X, cubeSize.Y, cubeSize.Z, raylib.Maroon)
+
+			raylib.DrawCubeWires(cubePosition, cubeSize.X+0.2, cubeSize.Y+0.2, cubeSize.Z+0.2, raylib.Green)
+		} else {
+			raylib.DrawCube(cubePosition, cubeSize.X, cubeSize.Y, cubeSize.Z, raylib.Gray)
+			raylib.DrawCubeWires(cubePosition, cubeSize.X, cubeSize.Y, cubeSize.Z, raylib.DarkGray)
+		}
+
+		raylib.DrawRay(ray, raylib.Maroon)
+
+		raylib.DrawGrid(10, 1.0)
+
+		raylib.End3dMode()
+
+		raylib.DrawText("Try selecting the box with mouse!", 240, 10, 20, raylib.DarkGray)
+
+		if collision {
+			raylib.DrawText("BOX SELECTED", (screenWidth-raylib.MeasureText("BOX SELECTED", 30))/2, int32(float32(screenHeight)*0.1), 30, raylib.Green)
+		}
+
+		raylib.DrawFPS(10, 10)
+
+		raylib.EndDrawing()
+	}
+
+	raylib.CloseWindow()
+}