working fpscontrols

assets/geometries/plane.obj

@@ -2,11 +2,11 @@
 # www.blender.org
 mtllib plane.mtl
 o Plane
-v -1.000000 -1.000000 -0.000000
-v 1.000000 -1.000000 -0.000000
-v -1.000000 1.000000 0.000000
-v 1.000000 1.000000 0.000000
-vn -0.0000 -0.0000 1.0000
+v -10.000000 0.000000 10.000000
+v 10.000000 0.000000 10.000000
+v -10.000000 0.000000 -10.000000
+v 10.000000 0.000000 -10.000000
+vn -0.0000 1.0000 -0.0000
 vt 0.999900 0.000100
 vt 0.999900 0.999900
 vt 0.000100 0.000100

assets/shader/deferred/deferred.fs

@@ -18,9 +18,8 @@ layout (location = 3) out vec3 position;
 void main() {
   position = pos;
   albedo = texture(s_albedo, tex).rgb;
-  normal = texture(s_normal, tex).rgb;
+  normal = normalize(texture(s_normal, tex).rgb * 2.0 - 1.0);
   material.x = texture(s_specular, tex).x;
   material.y = texture(s_roughness, tex).y;
   material.z = texture(s_metalic, tex).z;
 }
-

assets/shader/deferred/deferred.vs

@@ -15,6 +15,6 @@ out vec2 tex;
 void main() {
   gl_Position = projection * view * model * vec4(_pos, 1.0);
   pos = vec3(model * vec4(_pos, 1.0));
-  norm = _norm;
+  norm =  mat3(transpose(inverse(model))) * _norm;
   tex = _tex;
 }

assets/shader/screen/screen.fs

@@ -57,7 +57,7 @@ vec3 calc_light(light_t light) {
 void main() {
   albedo = texture(s_albedo, tex).rgb;
   depth = texture(s_depth, tex).x;
-  normal = (texture(s_normal, tex).rgb * 0.5) + 0.5;  
+  normal = texture(s_normal, tex).rgb;
   material = texture(s_material, tex).xyz;
   {
     specular = material.x;

main.go

@@ -17,8 +17,8 @@ import (
 )
 
 const (
-	WIDTH  = 800
-	HEIGHT = 600
+	WIDTH  = 1600
+	HEIGHT = 900
 	TITLE  = "opengl-deferred"
 	FOV    = 45.0
 )
@@ -89,12 +89,24 @@ func main() {
 	defer screenShader.Delete()
 
 	// geometry
-	cube, err := geometry.LoadOBJ("assets/geometries/suzanne.obj")
+	var geometries []geometry.Geometry
+
+	cube, err := geometry.LoadOBJ("assets/geometries/cube.obj")
 	if err != nil {
 		panic(err)
 	}
 	defer cube.Delete()
 
+	geometries = append(geometries, cube)
+
+	plane, err := geometry.LoadOBJ("assets/geometries/plane.obj")
+	if err != nil {
+		panic(err)
+	}
+	defer plane.Delete()
+
+	geometries = append(geometries, plane)
+
 	screen, err := geometry.Screen()
 	if err != nil {
 		panic(err)
@@ -134,7 +146,7 @@ func main() {
 
 	// lights
 	lights := []light.Light{
-		{Color: [3]float32{0, 1, 0}, Position: mgl32.Vec3{3, 3, 3}, Intensity: 3, Type: light.POINT},
+		{Color: [3]float32{0, 1, 0}, Position: mgl32.Vec3{3, 3, 3}, Intensity: 15, Type: light.POINT},
 		{Color: [3]float32{1, 0, 1}, Position: mgl32.Vec3{3, 3, -3}, Intensity: 15, Type: light.POINT},
 	}
 
@@ -149,7 +161,7 @@ func main() {
 	// transformations
 	projection := mgl32.Perspective(mgl32.DegToRad(FOV), float32(WIDTH)/HEIGHT, 0.1, 1000)
 	model := mgl32.Ident4()
-	controls := fpscontrols.New(1, 0.1, mgl32.Vec3{0, 0, -10}, 0, 0, window)
+	controls := fpscontrols.Get(10, 10, mgl32.Vec3{0, 0, -10}, mgl32.Vec2{0, 0}, window)
 
 	for !window.ShouldClose() {
 		glfw.PollEvents()
@@ -172,7 +184,7 @@ func main() {
 		// transfer uniforms
 		deferredShader.Use()
 		deferredShader.Mat4("projection", projection)
-		deferredShader.Mat4("view", controls.ViewMatrix())
+		deferredShader.Mat4("view", controls.View())
 		deferredShader.Mat4("model", model)
 
 		deferredShader.Int("s_albedo", 0)
@@ -180,7 +192,9 @@ func main() {
 		deferredShader.Int("s_specular", 2)
 		deferredShader.Int("s_roughness", 3)
 		deferredShader.Int("s_metalic", 4)
-		cube.Draw()
+		for _, g := range geometries {
+			g.Draw()
+		}
 
 		// second pass
 		gl.Disable(gl.DEPTH_TEST)
@@ -195,6 +209,7 @@ func main() {
 		screenShader.Int("s_normal", 2)
 		screenShader.Int("s_material", 3)
 		screenShader.Int("s_position", 4)
+
 		pos := controls.Position()
 		screenShader.Vec3("view_pos", &pos[0])
 

types/shader/shader.go

@@ -71,7 +71,7 @@ func (s *Shader) Light(l *light.Light) error {
 func compileShader(source string, shaderType uint32) (uint32, error) {
 	shader := gl.CreateShader(shaderType)
 
-	csource, free := gl.Strs(source)
+	csource, free := gl.Strs(source + "\x00")
 	gl.ShaderSource(shader, 1, csource, nil)
 	free()
 	gl.CompileShader(shader)

utils/fpscontrols/fpscontrols.go

@@ -1,6 +1,8 @@
 package fpscontrols
 
 import (
+	"math"
+
 	"github.com/go-gl/glfw/v3.3/glfw"
 	"github.com/go-gl/mathgl/mgl32"
 )
@@ -15,10 +17,32 @@ type FPSControls struct {
 	currentMove  mgl32.Vec3
 	currentLook  mgl32.Vec2
 	lastMousePos mgl32.Vec2
+
+	view mgl32.Mat4
+
+	lastTime float64
 }
 
 var instance *FPSControls
 
+func (c *FPSControls) Update() {
+	time := glfw.GetTime()
+
+	deltaTime := time - c.lastTime
+	c.lastTime = time
+
+	forward, right, up := c.directions()
+
+	globalUp := mgl32.Vec3{0, 1, 0}
+	move := right.Mul(c.currentMove.X()).Add(globalUp.Mul(c.currentMove.Y())).Add(forward.Mul(c.currentMove.Z()))
+	c.position = c.position.Add(move.Mul(float32(deltaTime) * c.moveSpeed))
+
+	c.rotation = c.rotation.Add(c.currentLook.Mul(float32(deltaTime) * c.lookSpeed))
+	c.currentLook = mgl32.Vec2{}
+	c.view = mgl32.LookAtV(c.position, c.position.Add(forward), up)
+
+}
+
 func Get(lookSpeed, moveSpeed float32, position mgl32.Vec3, rotation mgl32.Vec2, window *glfw.Window) *FPSControls {
 	if instance != nil {
 		return instance
@@ -45,33 +69,73 @@ func Get(lookSpeed, moveSpeed float32, position mgl32.Vec3, rotation mgl32.Vec2,
 
 		switch key {
 		case glfw.KeyW:
-			instance.currentMove[2] = -val
-		case glfw.KeyS:
 			instance.currentMove[2] = val
+		case glfw.KeyS:
+			instance.currentMove[2] = -val
 		case glfw.KeyA:
-			instance.currentMove[0] = -val
-		case glfw.KeyD:
 			instance.currentMove[0] = val
+		case glfw.KeyD:
+			instance.currentMove[0] = -val
 		case glfw.KeySpace:
-			instance.currentMove[1] = -val
-		case glfw.KeyLeftShift:
 			instance.currentMove[1] = val
+		case glfw.KeyLeftShift:
+			instance.currentMove[1] = -val
 		}
 	})
 
-	window.SetCursorPosCallback(func(window *glfw.Window, x float64, y float64) {
+	window.SetCursorPosCallback(func(window *glfw.Window, y float64, x float64) {
 		pos := mgl32.Vec2{float32(x), float32(y)}
 		instance.currentLook = instance.lastMousePos.Sub(pos)
+		instance.currentLook[0] *= -1
 		instance.lastMousePos = pos
 	})
 
+	window.SetInputMode(glfw.CursorMode, glfw.CursorDisabled)
+
 	return instance
 }
 
-func (c *FPSControls) forward() mgl32.Vec3 {
+func (c *FPSControls) directions() (mgl32.Vec3, mgl32.Vec3, mgl32.Vec3) {
+	rad := mgl32.Vec2{
+		mgl32.DegToRad(c.rotation.X()),
+		mgl32.DegToRad(c.rotation.Y()),
+	}
 
+	sin := mgl32.Vec2{
+		float32(math.Sin(float64(rad.X()))),
+		float32(math.Sin(float64(rad.Y()))),
+	}
+
+	cos := mgl32.Vec2{
+		float32(math.Cos(float64(rad.X()))),
+		float32(math.Cos(float64(rad.Y()))),
+	}
+
+	forward := mgl32.Vec3{
+		cos.X() * sin.Y(),
+		-sin.X(),
+		cos.X() * cos.Y(),
+	}
+
+	right := mgl32.Vec3{
+		cos.Y(),
+		0,
+		-sin.Y(),
+	}
+
+	up := forward.Cross(right)
+
+	return forward, right, up
 }
 
 func (c *FPSControls) View() mgl32.Mat4 {
-
+	return c.view
+}
+
+func (c *FPSControls) Position() mgl32.Vec3 {
+	return c.position
+}
+
+func (c *FPSControls) Rotation() mgl32.Vec2 {
+	return c.rotation
 }