80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
package main
|
|
|
|
import (
|
|
rl "github.com/gen2brain/raylib-go/raylib"
|
|
)
|
|
|
|
func main() {
|
|
screenWidth := int32(800)
|
|
screenHeight := int32(450)
|
|
|
|
rl.InitWindow(screenWidth, screenHeight, "raylib [core] example - 3d picking")
|
|
|
|
camera := rl.Camera3D{}
|
|
camera.Position = rl.NewVector3(10.0, 10.0, 10.0)
|
|
camera.Target = rl.NewVector3(0.0, 0.0, 0.0)
|
|
camera.Up = rl.NewVector3(0.0, 1.0, 0.0)
|
|
camera.Fovy = 45.0
|
|
camera.Projection = rl.CameraPerspective
|
|
|
|
cubePosition := rl.NewVector3(0.0, 1.0, 0.0)
|
|
cubeSize := rl.NewVector3(2.0, 2.0, 2.0)
|
|
|
|
var ray rl.Ray
|
|
var collision rl.RayCollision
|
|
|
|
rl.SetCameraMode(camera, rl.CameraFree) // Set a free camera mode
|
|
|
|
rl.SetTargetFPS(60)
|
|
|
|
for !rl.WindowShouldClose() {
|
|
rl.UpdateCamera(&camera) // Update camera
|
|
|
|
if rl.IsMouseButtonPressed(rl.MouseLeftButton) {
|
|
if !collision.Hit {
|
|
ray = rl.GetMouseRay(rl.GetMousePosition(), camera)
|
|
|
|
// Check collision between ray and box
|
|
min := rl.NewVector3(cubePosition.X-cubeSize.X/2, cubePosition.Y-cubeSize.Y/2, cubePosition.Z-cubeSize.Z/2)
|
|
max := rl.NewVector3(cubePosition.X+cubeSize.X/2, cubePosition.Y+cubeSize.Y/2, cubePosition.Z+cubeSize.Z/2)
|
|
collision = rl.GetRayCollisionBox(ray, rl.NewBoundingBox(min, max))
|
|
} else {
|
|
collision.Hit = false
|
|
}
|
|
}
|
|
|
|
rl.BeginDrawing()
|
|
|
|
rl.ClearBackground(rl.RayWhite)
|
|
|
|
rl.BeginMode3D(camera)
|
|
|
|
if collision.Hit {
|
|
rl.DrawCube(cubePosition, cubeSize.X, cubeSize.Y, cubeSize.Z, rl.Red)
|
|
rl.DrawCubeWires(cubePosition, cubeSize.X, cubeSize.Y, cubeSize.Z, rl.Maroon)
|
|
|
|
rl.DrawCubeWires(cubePosition, cubeSize.X+0.2, cubeSize.Y+0.2, cubeSize.Z+0.2, rl.Green)
|
|
} else {
|
|
rl.DrawCube(cubePosition, cubeSize.X, cubeSize.Y, cubeSize.Z, rl.Gray)
|
|
rl.DrawCubeWires(cubePosition, cubeSize.X, cubeSize.Y, cubeSize.Z, rl.DarkGray)
|
|
}
|
|
|
|
rl.DrawRay(ray, rl.Maroon)
|
|
|
|
rl.DrawGrid(10, 1.0)
|
|
|
|
rl.EndMode3D()
|
|
|
|
rl.DrawText("Try selecting the box with mouse!", 240, 10, 20, rl.DarkGray)
|
|
|
|
if collision.Hit {
|
|
rl.DrawText("BOX SELECTED", (screenWidth-rl.MeasureText("BOX SELECTED", 30))/2, int32(float32(screenHeight)*0.1), 30, rl.Green)
|
|
}
|
|
|
|
rl.DrawFPS(10, 10)
|
|
|
|
rl.EndDrawing()
|
|
}
|
|
|
|
rl.CloseWindow()
|
|
}
|