151 lines
3.7 KiB
Go
151 lines
3.7 KiB
Go
package main
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import (
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"fmt"
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"runtime"
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"git.tek.govt.hu/dowerx/opengl-deferred/types/gbuffer"
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"git.tek.govt.hu/dowerx/opengl-deferred/types/geometry"
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"git.tek.govt.hu/dowerx/opengl-deferred/types/light"
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"git.tek.govt.hu/dowerx/opengl-deferred/utils/assetmanager"
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"git.tek.govt.hu/dowerx/opengl-deferred/utils/fpscontrols"
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"github.com/go-gl/gl/v4.6-core/gl"
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"github.com/go-gl/glfw/v3.3/glfw"
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"github.com/go-gl/mathgl/mgl32"
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)
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const (
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WIDTH = 1600
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HEIGHT = 900
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TITLE = "opengl-deferred"
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FOV = 45.0
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)
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func main() {
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// init glfw
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runtime.LockOSThread()
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if err := glfw.Init(); err != nil {
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panic(err)
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}
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defer glfw.Terminate()
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glfw.WindowHint(glfw.Resizable, glfw.False)
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glfw.WindowHint(glfw.ContextVersionMajor, 4)
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glfw.WindowHint(glfw.ContextVersionMinor, 6)
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glfw.WindowHint(glfw.OpenGLProfile, glfw.OpenGLCoreProfile)
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glfw.WindowHint(glfw.OpenGLForwardCompatible, glfw.True)
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window, err := glfw.CreateWindow(WIDTH, HEIGHT, TITLE, nil, nil)
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if err != nil {
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panic(err)
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}
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window.MakeContextCurrent()
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// init gl
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if err := gl.Init(); err != nil {
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panic(err)
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}
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gl.Enable(gl.CULL_FACE)
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gl.DepthFunc(gl.LESS)
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gl.ClearColor(0, 0, 0, 1)
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fmt.Println("OpenGL version:", gl.GoStr(gl.GetString(gl.VERSION)))
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// load assets
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assetManager, err := assetmanager.Init("assets")
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if err != nil {
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panic(err)
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}
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defer assetManager.Destroy()
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screen, err := geometry.Screen()
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if err != nil {
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panic(err)
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}
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defer screen.Delete()
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// lights
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lights := []light.Light{
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{Color: [3]float32{1, 1, 1}, Position: mgl32.Vec3{0, 10, 0}, Intensity: 40, Type: light.POINT},
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{Color: [3]float32{1, 0, 0}, Position: mgl32.Vec3{5, 5, 5}, Intensity: 30, Type: light.POINT},
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{Color: [3]float32{0, 0, 1}, Position: mgl32.Vec3{-5, 5, -5}, Intensity: 30, Type: light.POINT},
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}
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// gbuffer
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gbuff, err := gbuffer.New(WIDTH, HEIGHT)
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if err != nil {
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panic(err)
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}
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defer gbuff.Delete()
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gbuff.Bind()
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// transformations
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projection := mgl32.Perspective(mgl32.DegToRad(FOV), float32(WIDTH)/HEIGHT, 0.1, 1000)
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model := mgl32.Ident4()
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controls := fpscontrols.Get(10, 10, mgl32.Vec3{0, 0, -10}, mgl32.Vec2{0, 0}, window)
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deferredShader := assetManager.GetShader("assets/shader/deferred")
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screenShader := assetManager.GetShader("assets/shader/screen")
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teapot := assetManager.GetGeometry("assets/geometry/teapot")
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for !window.ShouldClose() {
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glfw.PollEvents()
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controls.Update()
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// first pass
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gl.Enable(gl.DEPTH_TEST)
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gbuff.Bind()
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gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
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assetManager.GetTexture("assets/texture/albedo").Bind(gl.TEXTURE0)
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assetManager.GetTexture("assets/texture/normal").Bind(gl.TEXTURE1)
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assetManager.GetTexture("assets/texture/roughness").Bind(gl.TEXTURE2)
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assetManager.GetTexture("assets/texture/roughness").Bind(gl.TEXTURE3)
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assetManager.GetTexture("assets/texture/roughness").Bind(gl.TEXTURE4)
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// transfer uniforms
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deferredShader.Use()
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deferredShader.Mat4("projection", projection)
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deferredShader.Mat4("view", controls.View())
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deferredShader.Mat4("model", model)
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deferredShader.Int("s_albedo", 0)
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deferredShader.Int("s_normal", 1)
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deferredShader.Int("s_specular", 2)
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deferredShader.Int("s_roughness", 3)
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deferredShader.Int("s_metalic", 4)
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teapot.Draw()
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// second pass
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gl.Disable(gl.DEPTH_TEST)
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gl.BindFramebuffer(gl.FRAMEBUFFER, 0)
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gl.Clear(gl.COLOR_BUFFER_BIT)
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gbuff.BindTextures()
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screenShader.Use()
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screenShader.Int("s_albedo", 0)
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screenShader.Int("s_depth", 1)
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screenShader.Int("s_normal", 2)
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screenShader.Int("s_material", 3)
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screenShader.Int("s_position", 4)
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pos := controls.Position()
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screenShader.Vec3("view_pos", &pos[0])
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for _, light := range lights {
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screenShader.Light(&light)
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}
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screen.Draw()
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window.SwapBuffers()
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}
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defer fmt.Println("exiting...")
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}
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