113 lines
3.3 KiB
Go
113 lines
3.3 KiB
Go
package main
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import (
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"path/filepath"
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"slices"
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"unsafe"
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"github.com/gen2brain/raylib-go/raylib"
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)
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var supportedFileTypes = []string{
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".obj",
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".gltf",
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".glb",
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".vox",
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".iqm",
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".m3d",
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}
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func main() {
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screenWidth := int32(800)
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screenHeight := int32(450)
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rl.InitWindow(screenWidth, screenHeight, "raylib [models] example - obj model loading")
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camera := rl.Camera{}
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camera.Position = rl.NewVector3(50.0, 50.0, 50.0)
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camera.Target = rl.NewVector3(0.0, 10.0, 0.0)
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camera.Up = rl.NewVector3(0.0, 1.0, 0.0)
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camera.Fovy = 45.0
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camera.Projection = rl.CameraPerspective
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obj := rl.LoadModel("castle.obj") // Load OBJ model
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texture := rl.LoadTexture("castle_diffuse.png") // Load model texture
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rl.SetMaterialTexture(obj.Materials, rl.MapDiffuse, texture) // Set map diffuse texture
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position := rl.NewVector3(0.0, 0.0, 0.0) // Set model position
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meshes := unsafe.Slice(obj.Meshes, obj.MeshCount)
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bounds := rl.GetMeshBoundingBox(meshes[0]) // Set model bounds
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selected := false
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rl.DisableCursor()
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rl.SetTargetFPS(60)
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for !rl.WindowShouldClose() {
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// Update
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rl.UpdateCamera(&camera, rl.CameraFirstPerson)
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// Load new models/textures on drag&drop
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if rl.IsFileDropped() {
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droppedFiles := rl.LoadDroppedFiles()
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if len(droppedFiles) == 1 { // Only support one file dropped
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if slices.Contains(supportedFileTypes, filepath.Ext(droppedFiles[0])) { // Model file formats supported
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rl.UnloadModel(obj) // Unload previous model
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obj = rl.LoadModel(droppedFiles[0]) // Load new model
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rl.SetMaterialTexture(obj.Materials, rl.MapDiffuse, texture) // Set current map diffuse texture
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meshes = unsafe.Slice(obj.Meshes, obj.MeshCount)
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bounds = rl.GetMeshBoundingBox(meshes[0])
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// TODO: Move camera position from target enough distance to visualize model properly
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} else if filepath.Ext(droppedFiles[0]) == ".png" { // Texture file formats supported
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// Unload current model texture and load new one
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rl.UnloadTexture(texture)
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texture = rl.LoadTexture(droppedFiles[0])
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rl.SetMaterialTexture(obj.Materials, rl.MapDiffuse, texture) // Set current map diffuse texture
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}
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}
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rl.UnloadDroppedFiles() // Unload file paths from memory
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}
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// Select model on mouse click
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if rl.IsMouseButtonPressed(rl.MouseButtonLeft) {
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// Check collision between ray and box
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if rl.GetRayCollisionBox(rl.GetMouseRay(rl.GetMousePosition(), camera), bounds).Hit {
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selected = !selected
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} else {
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selected = false
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}
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}
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rl.BeginDrawing()
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rl.ClearBackground(rl.RayWhite)
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rl.BeginMode3D(camera)
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rl.DrawModel(obj, position, 1.0, rl.White) // Draw 3d model with texture
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rl.DrawGrid(20, 10.0) // Draw a grid
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if selected {
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rl.DrawBoundingBox(bounds, rl.Green) // Draw selection box
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}
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rl.EndMode3D()
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rl.DrawText("Drag & drop model to load mesh/texture", 10, screenHeight-20, 10, rl.Gray)
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if selected {
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rl.DrawText("Model selected!", screenWidth-110, 10, 10, rl.Green)
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}
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rl.DrawText("(c) Castle 3D model by Alberto Cano", screenWidth-200, screenHeight-20, 10, rl.Gray)
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rl.DrawFPS(10, 10)
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rl.EndDrawing()
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}
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rl.UnloadTexture(texture) // Unload texture
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rl.UnloadModel(obj) // Unload model
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rl.CloseWindow()
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}
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