add more model & shader examples

examples/models/vox_loading/main.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+	screenWidth := int32(1280)
+	screenHeight := int32(720)
+
+	rl.InitWindow(screenWidth, screenHeight, "raylib [models] example - voxel loading")
+
+	camera := rl.Camera{}
+	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
+
+	voxFiles := []string{"knight.vox", "sword.vox", "monument.vox"}
+
+	var models []rl.Model
+
+	for i := 0; i < len(voxFiles); i++ {
+		models = append(models, rl.LoadModel(voxFiles[i]))
+		bb := rl.GetModelBoundingBox(models[i])
+		center := rl.Vector3Zero()
+		center.X = bb.Min.X + ((bb.Max.X - bb.Min.X) / 2)
+		center.Z = bb.Min.Z + ((bb.Max.Z - bb.Min.Z) / 2)
+
+		matTranslate := rl.MatrixTranslate(-center.X, 0, -center.Z)
+		models[i].Transform = matTranslate
+	}
+
+	currentModel := 0
+
+	rl.DisableCursor()
+
+	rl.SetTargetFPS(60)
+
+	for !rl.WindowShouldClose() {
+
+		rl.UpdateCamera(&camera, rl.CameraOrbital)
+
+		if rl.IsKeyPressed(rl.KeyUp) {
+			currentModel++
+			if currentModel >= len(models) {
+				currentModel = 0
+			}
+
+		}
+		if rl.IsKeyPressed(rl.KeyDown) {
+			currentModel--
+			if currentModel < 0 {
+				currentModel = len(models) - 1
+			}
+
+		}
+
+		rl.BeginDrawing()
+
+		rl.ClearBackground(rl.RayWhite)
+
+		rl.BeginMode3D(camera)
+
+		rl.DrawModel(models[currentModel], rl.Vector3Zero(), 1, rl.White)
+
+		rl.EndMode3D()
+
+		rl.DrawText("current voxel file: "+voxFiles[currentModel], 10, 10, 10, rl.Black)
+		rl.DrawText("UP/DOWN ARROW KEYS CHANGE FILE", 10, 30, 10, rl.Black)
+		rl.DrawText("MOUSE SCROLL OR KEYPAD + / - TO CHANGE ZOOM", 10, 50, 10, rl.Black)
+
+		rl.EndDrawing()
+	}
+
+	for i := 0; i < len(models); i++ {
+		rl.UnloadModel(models[i])
+	}
+
+	rl.CloseWindow()
+}