example: I can add physic base render to example

examples/shaders/pbr/main.go

@@ -0,0 +1,83 @@
+package main
+
+import (
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+
+	screenWidth := int32(900)
+	screenHeight := int32(500)
+	rl.SetConfigFlags(rl.FlagMsaa4xHint) //ENABLE 4X MSAA IF AVAILABLE
+
+	rl.InitWindow(screenWidth, screenHeight, "raylib [shaders] example - basic pbr")
+
+	car := rl.LoadModel("./models/old_car_new.glb")
+	plane := rl.LoadModel("./models/plane.glb")
+
+	cam := rl.Camera3D{}
+	cam.Fovy = 45
+	cam.Position = rl.Vector3{2, 2, 8}
+	cam.Projection = rl.CameraPerspective
+	cam.Up = rl.Vector3{0, 1, 0}
+
+	shader := rl.LoadShader("./glsl330/pbr.vs", "./glsl330/pbr.fs")
+
+	l := Light{}
+	l.SetCombineShader(&shader)
+	l.Init(0.0, rl.Vector3{1, 1, 1})
+	l1 := l.NewLight(LightTypePoint, rl.Vector3{-1, 1, -2}, rl.Vector3{}, rl.Yellow, 4, &l.Shader)
+	l2 := l.NewLight(LightTypePoint, rl.Vector3{2, 1, 1}, rl.Vector3{}, rl.Green, 3.3, &l.Shader)
+	l3 := l.NewLight(LightTypePoint, rl.Vector3{-2, 1, 1}, rl.Vector3{}, rl.Red, 8.3, &l.Shader)
+	l4 := l.NewLight(LightTypePoint, rl.Vector3{1, 1, -2}, rl.Vector3{}, rl.Blue, 2, &l.Shader)
+
+	p := PhysicRender{}
+	p.SetCombineShader(&shader)
+	p.Init()
+
+	p.UseTexAlbedo()
+	p.UseTexMRA()
+	p.UseTexNormal()
+	p.UseTexEmissive()
+
+	car.GetMaterials()[0].Shader = shader
+
+	p.AlbedoColorModel(&car, rl.White)
+	p.MetallicValue(0.0)
+	p.RoughnessValue(0)
+	p.EmissivePower(0.0)
+	p.AoValue(0.0)
+	p.NormalValue(0.2)
+
+	p.EmissiveColor(rl.NewColor(255, 162, 0, 255))
+	p.TextureMapAlbedo(&car.GetMaterials()[0], rl.LoadTexture("models/old_car_d.png"))
+	p.TextureMapMetalness(&car.GetMaterials()[0], rl.LoadTexture("models/old_car_mra.png"))
+	p.TextureMapNormal(&car.GetMaterials()[0], rl.LoadTexture("models/old_car_n.png"))
+	rl.SetMaterialTexture(&car.GetMaterials()[0], rl.MapEmission, rl.LoadTexture("models/old_car_e.png"))
+
+	p.SetTiling(rl.NewVector2(1, 1))
+
+	plane.GetMaterials()[0].Shader = shader
+	p.TextureMapAlbedo(&plane.GetMaterials()[0], rl.LoadTexture("./models/road_a.png"))
+	p.TextureMapNormal(&plane.GetMaterials()[0], rl.LoadTexture("./models/road_n.png"))
+	p.TextureMapMetalness(&plane.GetMaterials()[0], rl.LoadTexture("./models/road_mra.png"))
+
+	rl.SetTargetFPS(60)
+	for !rl.WindowShouldClose() {
+		rl.UpdateCamera(&cam, rl.CameraOrbital)
+		p.UpadteByCamera(cam.Position)
+		rl.BeginDrawing()
+		rl.DrawFPS(10, 20)
+		rl.ClearBackground(rl.Gray)
+		rl.BeginMode3D(cam)
+		rl.DrawModel(car, rl.Vector3{0, 0.01, 0}, 0.25, rl.RayWhite)
+		rl.DrawModel(plane, rl.Vector3{0, 0, 0}, 5, rl.RayWhite)
+		l.DrawSpherelight(&l1)
+		l.DrawSpherelight(&l2)
+		l.DrawSpherelight(&l3)
+		l.DrawSpherelight(&l4)
+		rl.EndMode3D()
+		rl.EndDrawing()
+	}
+	rl.CloseWindow()
+}