Update assimp+remove unused funcs

assert/assert.go

@@ -1,4 +1,4 @@
-package asserts
+package assert
 
 import (
 	"github.com/bloeys/nmage/consts"

buffers/buf_usage.go

@@ -3,7 +3,7 @@ package buffers
 import (
 	"fmt"
 
-	"github.com/bloeys/nmage/asserts"
+	"github.com/bloeys/nmage/assert"
 	"github.com/go-gl/gl/v4.1-core/gl"
 )
 
@@ -28,6 +28,6 @@ func (b BufUsage) ToGL() uint32 {
 		return gl.STREAM_DRAW
 	}
 
-	asserts.T(false, fmt.Sprintf("Unexpected BufUsage value '%v'", b))
+	assert.T(false, fmt.Sprintf("Unexpected BufUsage value '%v'", b))
 	return 0
 }

buffers/buffers.go

@@ -41,6 +41,22 @@ func (b *Buffer) SetData(values []float32) {
 	gl.BindBuffer(gl.ARRAY_BUFFER, 0)
 }
 
+func (b *Buffer) SetDataWithUsage(values []float32, usage BufUsage) {
+
+	gl.BindVertexArray(b.VAOID)
+	gl.BindBuffer(gl.ARRAY_BUFFER, b.BufID)
+
+	sizeInBytes := len(values) * 4
+	if sizeInBytes == 0 {
+		gl.BufferData(gl.ARRAY_BUFFER, 0, gl.Ptr(nil), usage.ToGL())
+	} else {
+		gl.BufferData(gl.ARRAY_BUFFER, sizeInBytes, gl.Ptr(&values[0]), usage.ToGL())
+	}
+
+	gl.BindVertexArray(0)
+	gl.BindBuffer(gl.ARRAY_BUFFER, 0)
+}
+
 func (b *Buffer) SetIndexBufData(values []uint32) {
 
 	b.IndexBufCount = int32(len(values))

buffers/element.go

@@ -3,7 +3,7 @@ package buffers
 import (
 	"fmt"
 
-	"github.com/bloeys/nmage/asserts"
+	"github.com/bloeys/nmage/assert"
 	"github.com/go-gl/gl/v4.1-core/gl"
 )
 
@@ -45,7 +45,7 @@ func (dt ElementType) GLType() uint32 {
 		return gl.FLOAT
 
 	default:
-		asserts.T(false, fmt.Sprintf("Unknown data type passed. DataType '%v'", dt))
+		assert.T(false, fmt.Sprintf("Unknown data type passed. DataType '%v'", dt))
 		return 0
 	}
 }
@@ -68,7 +68,7 @@ func (dt ElementType) CompSize() int32 {
 		return 4
 
 	default:
-		asserts.T(false, fmt.Sprintf("Unknown data type passed. DataType '%v'", dt))
+		assert.T(false, fmt.Sprintf("Unknown data type passed. DataType '%v'", dt))
 		return 0
 	}
 }
@@ -92,7 +92,7 @@ func (dt ElementType) CompCount() int32 {
 		return 4
 
 	default:
-		asserts.T(false, fmt.Sprintf("Unknown data type passed. DataType '%v'", dt))
+		assert.T(false, fmt.Sprintf("Unknown data type passed. DataType '%v'", dt))
 		return 0
 	}
 }
@@ -116,7 +116,7 @@ func (dt ElementType) Size() int32 {
 		return 4 * 4
 
 	default:
-		asserts.T(false, fmt.Sprintf("Unknown data type passed. DataType '%v'", dt))
+		assert.T(false, fmt.Sprintf("Unknown data type passed. DataType '%v'", dt))
 		return 0
 	}
 }

camera/camera.go

@@ -0,0 +1,100 @@
+package camera
+
+import (
+	"github.com/bloeys/gglm/gglm"
+)
+
+type Type int32
+
+const (
+	Type_Unknown Type = iota
+	Type_Perspective
+	Type_Orthographic
+)
+
+type Camera struct {
+	Type Type
+
+	Pos     gglm.Vec3
+	Forward gglm.Vec3
+	WorldUp gglm.Vec3
+
+	NearClip float32
+	FarClip  float32
+
+	// Perspective data
+	Fov         float32
+	AspectRatio float32
+
+	// Ortho data
+	Left, Right, Top, Bottom float32
+
+	// Matrices
+	ViewMat gglm.Mat4
+	ProjMat gglm.Mat4
+}
+
+// Update recalculates view matrix and projection matrix.
+// Should be called whenever a camera parameter changes
+func (c *Camera) Update() {
+
+	c.ViewMat = gglm.LookAtRH(&c.Pos, c.Pos.Clone().Add(&c.Forward), &c.WorldUp).Mat4
+
+	if c.Type == Type_Perspective {
+		c.ProjMat = *gglm.Perspective(c.Fov, c.AspectRatio, c.NearClip, c.FarClip)
+	} else {
+		c.ProjMat = gglm.Ortho(c.Left, c.Right, c.Top, c.Bottom, c.NearClip, c.FarClip).Mat4
+	}
+}
+
+// UpdateRotation calculates a new forward vector and then calls camera.Update()
+func (c *Camera) UpdateRotation(pitch, yaw float32) {
+
+	dir := gglm.NewVec3(
+		gglm.Cos32(yaw)*gglm.Cos32(pitch),
+		gglm.Sin32(pitch),
+		gglm.Sin32(yaw)*gglm.Cos32(pitch),
+	)
+	c.Forward = *dir.Normalize()
+	c.Update()
+}
+
+func NewPerspective(pos, forward, worldUp *gglm.Vec3, nearClip, farClip, fovRadians, aspectRatio float32) *Camera {
+
+	cam := &Camera{
+		Type:    Type_Perspective,
+		Pos:     *pos,
+		Forward: *forward,
+		WorldUp: *worldUp,
+
+		NearClip: nearClip,
+		FarClip:  farClip,
+
+		Fov:         fovRadians,
+		AspectRatio: aspectRatio,
+	}
+	cam.Update()
+
+	return cam
+}
+
+func NewOrthographic(pos, forward, worldUp *gglm.Vec3, nearClip, farClip, left, right, top, bottom float32) *Camera {
+
+	cam := &Camera{
+		Type:    Type_Orthographic,
+		Pos:     *pos,
+		Forward: *forward,
+		WorldUp: *worldUp,
+
+		NearClip: nearClip,
+		FarClip:  farClip,
+
+		Left:   left,
+		Right:  right,
+		Top:    top,
+		Bottom: bottom,
+	}
+	cam.Update()
+
+	return cam
+}

engine/engine.go

@@ -3,7 +3,7 @@ package engine
 import (
 	"runtime"
 
-	"github.com/bloeys/nmage/asserts"
+	"github.com/bloeys/nmage/assert"
 	"github.com/bloeys/nmage/input"
 	"github.com/bloeys/nmage/renderer"
 	"github.com/bloeys/nmage/timing"
@@ -146,7 +146,7 @@ func CreateOpenGLWindowCentered(title string, width, height int32, flags WindowF
 
 func createWindow(title string, x, y, width, height int32, flags WindowFlags, rend renderer.Render) (*Window, error) {
 
-	asserts.T(isInited, "engine.Init was not called!")
+	assert.T(isInited, "engine.Init was not called!")
 	if x == -1 && y == -1 {
 		x = sdl.WINDOWPOS_CENTERED
 		y = sdl.WINDOWPOS_CENTERED
@@ -194,7 +194,7 @@ func initOpenGL() error {
 }
 
 func SetVSync(enabled bool) {
-	asserts.T(isInited, "engine.Init was not called!")
+	assert.T(isInited, "engine.Init was not called!")
 
 	if enabled {
 		sdl.GLSetSwapInterval(1)

entity/entity.go

@@ -0,0 +1,77 @@
+package entity
+
+type EntityFlag byte
+
+const (
+	EntityFlag_Unknown EntityFlag = 0
+	EntityFlag_Dead    EntityFlag = 1 << (iota - 1)
+	EntityFlag_Alive
+)
+
+const (
+	GenerationShiftBits = 64 - 8
+	FlagsShiftBits      = 64 - 16
+	IndexBitMask        = 0x00_00_FFFF_FFFF_FFFF
+)
+
+type Entity struct {
+
+	// Byte 1: Generation; Byte 2: Flags; Bytes 3-8: Index
+	ID    uint64
+	Comps []Comp
+}
+
+func GetGeneration(id uint64) byte {
+	return byte(id >> GenerationShiftBits)
+}
+
+func GetFlags(id uint64) byte {
+	return byte(id >> FlagsShiftBits)
+}
+
+func GetIndex(id uint64) uint64 {
+	return id & IndexBitMask
+}
+
+func (e *Entity) HasFlag(ef EntityFlag) bool {
+	return GetFlags(e.ID)&byte(ef) > 0
+}
+
+func NewEntityId(generation, flags byte, index uint64) uint64 {
+	return index | (uint64(generation) << GenerationShiftBits) | (uint64(flags) << FlagsShiftBits)
+}
+
+type Comp interface {
+	Name() string
+}
+
+func AddComp(e *Entity, c Comp) {
+	e.Comps = append(e.Comps, c)
+}
+
+func GetComp[T Comp](e *Entity) (out T) {
+
+	for i := 0; i < len(e.Comps); i++ {
+
+		comp, ok := e.Comps[i].(T)
+		if ok {
+			return comp
+		}
+	}
+
+	return out
+}
+
+func GetAllCompOfType[T Comp](e *Entity) (out []T) {
+
+	out = []T{}
+	for i := 0; i < len(e.Comps); i++ {
+
+		comp, ok := e.Comps[i].(T)
+		if ok {
+			out = append(out, comp)
+		}
+	}
+
+	return out
+}

entity/registry.go

@@ -0,0 +1,94 @@
+package entity
+
+import (
+	"github.com/bloeys/nmage/assert"
+)
+
+type freeListitem struct {
+	EntityIndex uint64
+	nextFree    *freeListitem
+}
+
+type Registry struct {
+	EntityCount uint64
+	Entities    []Entity
+	FreeList    *freeListitem
+}
+
+func (r *Registry) NewEntity() *Entity {
+
+	assert.T(r.EntityCount < uint64(len(r.Entities)), "Can not add more entities to registry because it is full")
+
+	entityToUseIndex := uint64(0)
+	var entityToUse *Entity = nil
+
+	if r.FreeList != nil {
+
+		entityToUseIndex = r.FreeList.EntityIndex
+		entityToUse = &r.Entities[entityToUseIndex]
+		r.FreeList = r.FreeList.nextFree
+	} else {
+
+		for i := 0; i < len(r.Entities); i++ {
+
+			e := &r.Entities[i]
+			if GetFlags(e.ID) != byte(EntityFlag_Unknown) && !e.HasFlag(EntityFlag_Dead) {
+				continue
+			}
+
+			entityToUse = e
+			entityToUseIndex = uint64(i)
+			break
+		}
+	}
+
+	if entityToUse == nil {
+		panic("failed to create new entity because we did not find a free spot in the registry. Why did the assert not go off?")
+	}
+
+	r.EntityCount++
+	entityToUse.ID = NewEntityId(GetGeneration(entityToUse.ID)+1, byte(EntityFlag_Alive), entityToUseIndex)
+	assert.T(entityToUse.ID != 0, "Entity ID must not be zero")
+	return entityToUse
+}
+
+func (r *Registry) GetEntity(id uint64) *Entity {
+
+	index := GetIndex(id)
+	gen := GetGeneration(id)
+
+	e := &r.Entities[index]
+	eGen := GetGeneration(e.ID)
+
+	if gen != eGen {
+		return nil
+	}
+
+	return e
+}
+
+func (r *Registry) FreeEntity(id uint64) {
+
+	e := r.GetEntity(id)
+	if e == nil {
+		return
+	}
+
+	r.EntityCount--
+	eIndex := GetIndex(e.ID)
+
+	e.Comps = []Comp{}
+	e.ID = NewEntityId(GetGeneration(e.ID), byte(EntityFlag_Dead), eIndex)
+
+	r.FreeList = &freeListitem{
+		EntityIndex: eIndex,
+		nextFree:    r.FreeList,
+	}
+}
+
+func NewRegistry(size uint32) *Registry {
+	assert.T(size > 0, "Registry size must be more than zero")
+	return &Registry{
+		Entities: make([]Entity, size),
+	}
+}

go.mod

@@ -1,13 +1,13 @@
 module github.com/bloeys/nmage
 
-go 1.17
+go 1.18
 
-require github.com/veandco/go-sdl2 v0.4.10
+require github.com/veandco/go-sdl2 v0.4.25
 
-require github.com/go-gl/gl v0.0.0-20211025173605-bda47ffaa784
+require github.com/go-gl/gl v0.0.0-20211210172815-726fda9656d6
 
 require (
-	github.com/bloeys/assimp-go v0.4.2
-	github.com/bloeys/gglm v0.41.10
-	github.com/inkyblackness/imgui-go/v4 v4.3.0
+	github.com/bloeys/assimp-go v0.4.4
+	github.com/bloeys/gglm v0.42.0
+	github.com/inkyblackness/imgui-go/v4 v4.6.0
 )

go.sum

@@ -1,19 +1,17 @@
-github.com/bloeys/assimp-go v0.4.2 h1:ArVK74BCFcTO/rCGj2NgZG9xtbjnJdEn5npIeJx1Z04=
-github.com/bloeys/assimp-go v0.4.2/go.mod h1:my3yRxT7CfOztmvi+0svmwbaqw0KFrxaHxncoyaEIP0=
-github.com/bloeys/gglm v0.3.1 h1:Sy9upW7SBsBfDXrSmEhid3aQ+7J7itej+upwcxOnPMQ=
-github.com/bloeys/gglm v0.3.1/go.mod h1:qwJQ0WzV191wAMwlGicbfbChbKoSedMk7gFFX6GnyOk=
-github.com/bloeys/gglm v0.41.10 h1:R9FMiI+VQVXAI+vDwCB7z9xqzy5VAR1657u8TQTDNKA=
-github.com/bloeys/gglm v0.41.10/go.mod h1:qwJQ0WzV191wAMwlGicbfbChbKoSedMk7gFFX6GnyOk=
+github.com/bloeys/assimp-go v0.4.4 h1:Yn5e/RpE0Oes0YMBy8O7KkwAO4R/RpgrZPJCt08dVIU=
+github.com/bloeys/assimp-go v0.4.4/go.mod h1:my3yRxT7CfOztmvi+0svmwbaqw0KFrxaHxncoyaEIP0=
+github.com/bloeys/gglm v0.42.0 h1:UAUFGTaZv3dpZ0YSIQVum3bdeCZgNmx965VLnD2v11k=
+github.com/bloeys/gglm v0.42.0/go.mod h1:qwJQ0WzV191wAMwlGicbfbChbKoSedMk7gFFX6GnyOk=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-gl/gl v0.0.0-20211025173605-bda47ffaa784 h1:1Zi56D0LNfvkzM+BdoxKryvUEdyWO7LP8oRT+oSYJW0=
-github.com/go-gl/gl v0.0.0-20211025173605-bda47ffaa784/go.mod h1:9YTyiznxEY1fVinfM7RvRcjRHbw2xLBJ3AAGIT0I4Nw=
-github.com/inkyblackness/imgui-go/v4 v4.3.0 h1:iyAzqWXq/dG5+6ckDPhGivtrIo6AywGQMvENKzun04s=
-github.com/inkyblackness/imgui-go/v4 v4.3.0/go.mod h1:g8SAGtOYUP7rYaOB2AsVKCEHmPMDmJKgt4z6d+flhb0=
+github.com/go-gl/gl v0.0.0-20211210172815-726fda9656d6 h1:zDw5v7qm4yH7N8C8uWd+8Ii9rROdgWxQuGoJ9WDXxfk=
+github.com/go-gl/gl v0.0.0-20211210172815-726fda9656d6/go.mod h1:9YTyiznxEY1fVinfM7RvRcjRHbw2xLBJ3AAGIT0I4Nw=
+github.com/inkyblackness/imgui-go/v4 v4.6.0 h1:ShcnXEYl80+xREGBY9OpGWePA6FfJChY9Varsm+3jjE=
+github.com/inkyblackness/imgui-go/v4 v4.6.0/go.mod h1:g8SAGtOYUP7rYaOB2AsVKCEHmPMDmJKgt4z6d+flhb0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/veandco/go-sdl2 v0.4.10 h1:8QoD2bhWl7SbQDflIAUYWfl9Vq+mT8/boJFAUzAScgY=
-github.com/veandco/go-sdl2 v0.4.10/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=
+github.com/veandco/go-sdl2 v0.4.25 h1:J5ac3KKOccp/0xGJA1PaNYKPUcZm19IxhDGs8lJofPI=
+github.com/veandco/go-sdl2 v0.4.25/go.mod h1:OROqMhHD43nT4/i9crJukyVecjPNYYuCofep6SNiAjY=

level/level.go

@@ -0,0 +1,20 @@
+package level
+
+import (
+	"github.com/bloeys/nmage/assert"
+	"github.com/bloeys/nmage/entity"
+)
+
+type Level struct {
+	*entity.Registry
+	Name string
+}
+
+func NewLevel(name string, maxEntities uint32) *Level {
+
+	assert.T(name != "", "Level name can not be empty")
+	return &Level{
+		Name:     name,
+		Registry: entity.NewRegistry(maxEntities),
+	}
+}

main.go

@@ -6,8 +6,11 @@ import (
 	"github.com/bloeys/assimp-go/asig"
 	"github.com/bloeys/gglm/gglm"
 	"github.com/bloeys/nmage/assets"
+	"github.com/bloeys/nmage/camera"
 	"github.com/bloeys/nmage/engine"
+	"github.com/bloeys/nmage/entity"
 	"github.com/bloeys/nmage/input"
+	"github.com/bloeys/nmage/level"
 	"github.com/bloeys/nmage/logging"
 	"github.com/bloeys/nmage/materials"
 	"github.com/bloeys/nmage/meshes"
@@ -18,9 +21,10 @@ import (
 	"github.com/veandco/go-sdl2/sdl"
 )
 
-//TODO: Tasks:
-// Camera class
-// Entities and components
+// @Todo:
+// Complete entity registry (e.g. HasEntity, GetEntity, Generational Indices etc...)
+// Helper functions to update active entities
+
 // Integrate physx
 // Create VAO struct independent from VBO to support multi-VBO use cases (e.g. instancing)
 // Renderer batching
@@ -31,18 +35,24 @@ import (
 // Frustum culling
 // Material system editor with fields automatically extracted from the shader
 
+const (
+	camSpeed         = 15
+	mouseSensitivity = 0.5
+)
+
 var (
 	window *engine.Window
 
+	pitch float32 = 0
+	yaw   float32 = -90
+	cam   *camera.Camera
+
 	simpleMat *materials.Material
 	cubeMesh  *meshes.Mesh
 
-	modelMat   = gglm.NewTrMatId()
-	projMat    = &gglm.Mat4{}
-	camPos     = gglm.NewVec3(0, 0, -10)
-	camForward = gglm.NewVec3(0, 0, 1)
+	cubeModelMat = gglm.NewTrMatId()
 
-	lightPos1   = gglm.NewVec3(2, 2, 0)
+	lightPos1   = gglm.NewVec3(-2, 0, 2)
 	lightColor1 = gglm.NewVec3(1, 1, 1)
 )
 
@@ -51,6 +61,91 @@ type OurGame struct {
 	ImGUIInfo nmageimgui.ImguiInfo
 }
 
+type TransformComp struct {
+	Pos   *gglm.Vec3
+	Rot   *gglm.Quat
+	Scale *gglm.Vec3
+}
+
+func (t TransformComp) Name() string {
+	return "Transform Component"
+}
+
+func Test() {
+
+	lvl := level.NewLevel("test level", 1000)
+	e1 := lvl.Registry.NewEntity()
+
+	trComp := entity.GetComp[*TransformComp](e1)
+	fmt.Println("Got comp 1:", trComp)
+
+	e1.Comps = append(e1.Comps, &TransformComp{
+		Pos:   gglm.NewVec3(0, 0, 0),
+		Rot:   gglm.NewQuatEulerXYZ(0, 0, 0),
+		Scale: gglm.NewVec3(0, 0, 0),
+	}, &TransformComp{
+		Pos:   gglm.NewVec3(0, 0, 0),
+		Rot:   gglm.NewQuatEulerXYZ(0, 0, 0),
+		Scale: gglm.NewVec3(1, 1, 1),
+	})
+
+	trComp = entity.GetComp[*TransformComp](e1)
+	fmt.Println("Got comp 2:", trComp)
+
+	trComps := entity.GetAllCompOfType[*TransformComp](e1)
+	fmt.Printf("Got comp 3: %+v, %+v\n", trComps[0], trComps[1])
+
+	fmt.Printf("Entity: %+v\n", e1)
+	fmt.Printf("Entity: %+v\n", lvl.Registry.NewEntity())
+	fmt.Printf("Entity: %+v\n", lvl.Registry.NewEntity())
+	fmt.Printf("Entity: %+v\n", lvl.Registry.NewEntity())
+}
+
+func main() {
+
+	// Test()
+	// return
+
+	//Init engine
+	err := engine.Init()
+	if err != nil {
+		logging.ErrLog.Fatalln("Failed to init nMage. Err:", err)
+	}
+
+	//Create window
+	window, err = engine.CreateOpenGLWindowCentered("nMage", 1280, 720, engine.WindowFlags_RESIZABLE, rend3dgl.NewRend3DGL())
+	if err != nil {
+		logging.ErrLog.Fatalln("Failed to create window. Err: ", err)
+	}
+	defer window.Destroy()
+
+	engine.SetVSync(false)
+
+	game := &OurGame{
+		Win:       window,
+		ImGUIInfo: nmageimgui.NewImGUI(),
+	}
+	window.EventCallbacks = append(window.EventCallbacks, game.handleWindowEvents)
+
+	engine.Run(game, window, game.ImGUIInfo)
+}
+
+func (g *OurGame) handleWindowEvents(e sdl.Event) {
+
+	switch e := e.(type) {
+	case *sdl.WindowEvent:
+		if e.Event == sdl.WINDOWEVENT_SIZE_CHANGED {
+
+			width := e.Data1
+			height := e.Data2
+			cam.AspectRatio = float32(width) / float32(height)
+			cam.Update()
+
+			simpleMat.SetUnifMat4("projMat", &cam.ProjMat)
+		}
+	}
+}
+
 func (g *OurGame) Init() {
 
 	//Create materials
@@ -77,70 +172,126 @@ func (g *OurGame) Init() {
 	scaleMat := gglm.NewScaleMat(gglm.NewVec3(0.25, 0.25, 0.25))
 	rotMat := gglm.NewRotMat(gglm.NewQuatEuler(gglm.NewVec3(0, 0, 0).AsRad()))
 
-	modelMat.Mul(translationMat.Mul(rotMat.Mul(scaleMat)))
-	simpleMat.SetUnifMat4("modelMat", &modelMat.Mat4)
+	cubeModelMat.Mul(translationMat.Mul(rotMat.Mul(scaleMat)))
+	simpleMat.SetUnifMat4("modelMat", &cubeModelMat.Mat4)
+
+	// Camera
+	winWidth, winHeight := g.Win.SDLWin.GetSize()
+	cam = camera.NewPerspective(
+		gglm.NewVec3(0, 0, 10),
+		gglm.NewVec3(0, 0, -1),
+		gglm.NewVec3(0, 1, 0),
+		0.1, 20,
+		45*gglm.Deg2Rad,
+		float32(winWidth)/float32(winHeight),
+	)
+	simpleMat.SetUnifMat4("projMat", &cam.ProjMat)
 
-	//Moves objects into the cameras view
 	updateViewMat()
 
-	//Perspective/Depth
-	projMat := gglm.Perspective(45*gglm.Deg2Rad, float32(1280)/float32(720), 0.1, 500)
-	simpleMat.SetUnifMat4("projMat", projMat)
-
 	//Lights
 	simpleMat.SetUnifVec3("lightPos1", lightPos1)
 	simpleMat.SetUnifVec3("lightColor1", lightColor1)
 }
 
+// @TODO: Add this to gglm
+// func vecRotByQuat(v *gglm.Vec3, q *gglm.Quat) *gglm.Vec3 {
+
+// 	// Reference: https://gamedev.stackexchange.com/questions/28395/rotating-vector3-by-a-quaternion
+// 	qVec := gglm.NewVec3(q.X(), q.Y(), q.Z())
+
+// 	rotatedVec := qVec.Clone().Scale(2 * gglm.DotVec3(v, qVec))
+
+// 	t1 := q.W()*q.W() - gglm.DotVec3(qVec, qVec)
+// 	rotatedVec.Add(v.Clone().Scale(t1))
+
+// 	rotatedVec.Add(gglm.Cross(qVec, v).Scale(2 * q.W()))
+// 	return rotatedVec
+// }
+
 func (g *OurGame) Update() {
 
 	if input.IsQuitClicked() || input.KeyClicked(sdl.K_ESCAPE) {
 		engine.Quit()
 	}
 
-	winWidth, winHeight := g.Win.SDLWin.GetSize()
-	projMat = gglm.Perspective(45*gglm.Deg2Rad, float32(winWidth)/float32(winHeight), 0.1, 20)
-	simpleMat.SetUnifMat4("projMat", projMat)
-
-	//Camera movement
-	var camSpeed float32 = 15
-	if input.KeyDown(sdl.K_w) {
-		camPos.Data[1] += camSpeed * timing.DT()
-		updateViewMat()
-	}
-	if input.KeyDown(sdl.K_s) {
-		camPos.Data[1] -= camSpeed * timing.DT()
-		updateViewMat()
-	}
-	if input.KeyDown(sdl.K_d) {
-		camPos.Data[0] += camSpeed * timing.DT()
-		updateViewMat()
-	}
-	if input.KeyDown(sdl.K_a) {
-		camPos.Data[0] -= camSpeed * timing.DT()
-		updateViewMat()
-	}
-
-	if input.GetMouseWheelYNorm() > 0 {
-		camPos.Data[2] += 1
-		updateViewMat()
-	} else if input.GetMouseWheelYNorm() < 0 {
-		camPos.Data[2] -= 1
-		updateViewMat()
-	}
+	g.updateCameraLookAround()
+	g.updateCameraPos()
 
 	//Rotating cubes
 	if input.KeyDown(sdl.K_SPACE) {
-		modelMat.Rotate(10*timing.DT()*gglm.Deg2Rad, gglm.NewVec3(1, 1, 1).Normalize())
-		simpleMat.SetUnifMat4("modelMat", &modelMat.Mat4)
+		cubeModelMat.Rotate(10*timing.DT()*gglm.Deg2Rad, gglm.NewVec3(1, 1, 1).Normalize())
+		simpleMat.SetUnifMat4("modelMat", &cubeModelMat.Mat4)
 	}
 
-	imgui.DragFloat3("Cam Pos", &camPos.Data)
+	if imgui.DragFloat3("Cam Pos", &cam.Pos.Data) {
+		updateViewMat()
+	}
+	if imgui.DragFloat3("Cam Forward", &cam.Forward.Data) {
+		updateViewMat()
+	}
+
+	if input.KeyClicked(sdl.K_F4) {
+		fmt.Printf("Pos: %s; Forward: %s; |Forward|: %f\n", cam.Pos.String(), cam.Forward.String(), cam.Forward.Mag())
+	}
+}
+
+func (g *OurGame) updateCameraLookAround() {
+
+	mouseX, mouseY := input.GetMouseMotion()
+	if mouseX == 0 && mouseY == 0 {
+		return
+	}
+
+	// Yaw
+	yaw += float32(mouseX) * mouseSensitivity * timing.DT()
+
+	// Pitch
+	pitch += float32(-mouseY) * mouseSensitivity * timing.DT()
+	if pitch > 89.0 {
+		pitch = 89.0
+	}
+
+	if pitch < -89.0 {
+		pitch = -89.0
+	}
+
+	// Update cam forward
+	cam.UpdateRotation(pitch, yaw)
+
+	updateViewMat()
+}
+
+func (g *OurGame) updateCameraPos() {
+
+	update := false
+
+	// Forward and backward
+	if input.KeyDown(sdl.K_w) {
+		cam.Pos.Add(cam.Forward.Clone().Scale(camSpeed * timing.DT()))
+		update = true
+	} else if input.KeyDown(sdl.K_s) {
+		cam.Pos.Add(cam.Forward.Clone().Scale(-camSpeed * timing.DT()))
+		update = true
+	}
+
+	// Left and right
+	if input.KeyDown(sdl.K_d) {
+		cam.Pos.Add(gglm.Cross(&cam.Forward, &cam.WorldUp).Normalize().Scale(camSpeed * timing.DT()))
+		update = true
+	} else if input.KeyDown(sdl.K_a) {
+		cam.Pos.Add(gglm.Cross(&cam.Forward, &cam.WorldUp).Normalize().Scale(-camSpeed * timing.DT()))
+		update = true
+	}
+
+	if update {
+		updateViewMat()
+	}
 }
 
 func (g *OurGame) Render() {
 
-	tempModelMat := modelMat.Clone()
+	tempModelMat := cubeModelMat.Clone()
 
 	rowSize := 100
 	for y := 0; y < rowSize; y++ {
@@ -161,33 +312,7 @@ func (g *OurGame) DeInit() {
 	g.Win.Destroy()
 }
 
-func main() {
-
-	//Init engine
-	err := engine.Init()
-	if err != nil {
-		logging.ErrLog.Fatalln("Failed to init nMage. Err:", err)
-	}
-
-	//Create window
-	window, err = engine.CreateOpenGLWindowCentered("nMage", 1280, 720, engine.WindowFlags_RESIZABLE, rend3dgl.NewRend3DGL())
-	if err != nil {
-		logging.ErrLog.Fatalln("Failed to create window. Err: ", err)
-	}
-	defer window.Destroy()
-
-	engine.SetVSync(false)
-
-	game := &OurGame{
-		Win:       window,
-		ImGUIInfo: nmageimgui.NewImGUI(),
-	}
-
-	engine.Run(game, window, game.ImGUIInfo)
-}
-
 func updateViewMat() {
-	targetPos := camPos.Clone().Add(camForward)
-	viewMat := gglm.LookAt(camPos, targetPos, gglm.NewVec3(0, 1, 0))
-	simpleMat.SetUnifMat4("viewMat", &viewMat.Mat4)
+	cam.Update()
+	simpleMat.SetUnifMat4("viewMat", &cam.ViewMat)
 }

materials/material.go

@@ -2,7 +2,7 @@ package materials
 
 import (
 	"github.com/bloeys/gglm/gglm"
-	"github.com/bloeys/nmage/asserts"
+	"github.com/bloeys/nmage/assert"
 	"github.com/bloeys/nmage/logging"
 	"github.com/bloeys/nmage/shaders"
 	"github.com/go-gl/gl/v4.1-core/gl"
@@ -42,7 +42,7 @@ func (m *Material) GetAttribLoc(attribName string) int32 {
 	}
 
 	loc = gl.GetAttribLocation(m.ShaderProg.ID, gl.Str(attribName+"\x00"))
-	asserts.T(loc != -1, "Attribute '"+attribName+"' doesn't exist on material "+m.Name)
+	assert.T(loc != -1, "Attribute '"+attribName+"' doesn't exist on material "+m.Name)
 	m.AttribLocs[attribName] = loc
 	return loc
 }
@@ -55,7 +55,7 @@ func (m *Material) GetUnifLoc(uniformName string) int32 {
 	}
 
 	loc = gl.GetUniformLocation(m.ShaderProg.ID, gl.Str(uniformName+"\x00"))
-	asserts.T(loc != -1, "Uniform '"+uniformName+"' doesn't exist on material "+m.Name)
+	assert.T(loc != -1, "Uniform '"+uniformName+"' doesn't exist on material "+m.Name)
 	m.UnifLocs[uniformName] = loc
 	return loc
 }

meshes/mesh.go

@@ -6,7 +6,7 @@ import (
 
 	"github.com/bloeys/assimp-go/asig"
 	"github.com/bloeys/gglm/gglm"
-	"github.com/bloeys/nmage/asserts"
+	"github.com/bloeys/nmage/assert"
 	"github.com/bloeys/nmage/buffers"
 )
 
@@ -31,7 +31,10 @@ func NewMesh(name, modelPath string, postProcessFlags asig.PostProcess) (*Mesh,
 	sceneMesh := scene.Meshes[0]
 	mesh.Buf = buffers.NewBuffer()
 
-	asserts.T(len(sceneMesh.TexCoords[0]) > 0, "Mesh has no UV0")
+	if len(sceneMesh.TexCoords[0]) == 0 {
+		sceneMesh.TexCoords[0] = make([]gglm.Vec3, len(sceneMesh.Vertices))
+	}
+
 	layoutToUse := []buffers.Element{{ElementType: buffers.DataTypeVec3}, {ElementType: buffers.DataTypeVec3}, {ElementType: buffers.DataTypeVec2}}
 
 	if len(sceneMesh.ColorSets) > 0 && len(sceneMesh.ColorSets[0]) > 0 {
@@ -73,9 +76,9 @@ type arrToInterleave struct {
 
 func (a *arrToInterleave) get(i int) []float32 {
 
-	asserts.T(len(a.V2s) == 0 || len(a.V3s) == 0, "One array should be set in arrToInterleave, but both arrays are set")
-	asserts.T(len(a.V2s) == 0 || len(a.V4s) == 0, "One array should be set in arrToInterleave, but both arrays are set")
-	asserts.T(len(a.V3s) == 0 || len(a.V4s) == 0, "One array should be set in arrToInterleave, but both arrays are set")
+	assert.T(len(a.V2s) == 0 || len(a.V3s) == 0, "One array should be set in arrToInterleave, but both arrays are set")
+	assert.T(len(a.V2s) == 0 || len(a.V4s) == 0, "One array should be set in arrToInterleave, but both arrays are set")
+	assert.T(len(a.V3s) == 0 || len(a.V4s) == 0, "One array should be set in arrToInterleave, but both arrays are set")
 
 	if len(a.V2s) > 0 {
 		return a.V2s[i].Data[:]
@@ -88,8 +91,8 @@ func (a *arrToInterleave) get(i int) []float32 {
 
 func interleave(arrs ...arrToInterleave) []float32 {
 
-	asserts.T(len(arrs) > 0, "No input sent to interleave")
-	asserts.T(len(arrs[0].V2s) > 0 || len(arrs[0].V3s) > 0 || len(arrs[0].V4s) > 0, "Interleave arrays are empty")
+	assert.T(len(arrs) > 0, "No input sent to interleave")
+	assert.T(len(arrs[0].V2s) > 0 || len(arrs[0].V3s) > 0 || len(arrs[0].V4s) > 0, "Interleave arrays are empty")
 
 	elementCount := 0
 	if len(arrs[0].V2s) > 0 {
@@ -104,7 +107,7 @@ func interleave(arrs ...arrToInterleave) []float32 {
 	totalSize := 0
 	for i := 0; i < len(arrs); i++ {
 
-		asserts.T(len(arrs[i].V2s) == elementCount || len(arrs[i].V3s) == elementCount || len(arrs[i].V4s) == elementCount, "Mesh vertex data given to interleave is not the same length")
+		assert.T(len(arrs[i].V2s) == elementCount || len(arrs[i].V3s) == elementCount || len(arrs[i].V4s) == elementCount, "Mesh vertex data given to interleave is not the same length")
 
 		if len(arrs[i].V2s) > 0 {
 			totalSize += len(arrs[i].V2s) * 2
@@ -125,34 +128,9 @@ func interleave(arrs ...arrToInterleave) []float32 {
 	return out
 }
 
-func flattenVec3(vec3s []gglm.Vec3) []float32 {
-
-	floats := make([]float32, len(vec3s)*3)
-	for i := 0; i < len(vec3s); i++ {
-		floats[i*3+0] = vec3s[i].X()
-		floats[i*3+1] = vec3s[i].Y()
-		floats[i*3+2] = vec3s[i].Z()
-	}
-
-	return floats
-}
-
-func flattenVec4(vec4s []gglm.Vec4) []float32 {
-
-	floats := make([]float32, len(vec4s)*4)
-	for i := 0; i < len(vec4s); i++ {
-		floats[i*4+0] = vec4s[i].X()
-		floats[i*4+1] = vec4s[i].Y()
-		floats[i*4+2] = vec4s[i].Z()
-		floats[i*4+3] = vec4s[i].W()
-	}
-
-	return floats
-}
-
 func flattenFaces(faces []asig.Face) []uint32 {
 
-	asserts.T(len(faces[0].Indices) == 3, fmt.Sprintf("Face doesn't have 3 indices. Index count: %v\n", len(faces[0].Indices)))
+	assert.T(len(faces[0].Indices) == 3, fmt.Sprintf("Face doesn't have 3 indices. Index count: %v\n", len(faces[0].Indices)))
 
 	uints := make([]uint32, len(faces)*3)
 	for i := 0; i < len(faces); i++ {

ui/imgui/imgui.go

@@ -2,7 +2,7 @@ package nmageimgui
 
 import (
 	"github.com/bloeys/gglm/gglm"
-	"github.com/bloeys/nmage/asserts"
+	"github.com/bloeys/nmage/assert"
 	"github.com/bloeys/nmage/materials"
 	"github.com/bloeys/nmage/timing"
 	"github.com/go-gl/gl/v4.1-core/gl"
@@ -23,7 +23,7 @@ type ImguiInfo struct {
 func (i *ImguiInfo) FrameStart(winWidth, winHeight float32) {
 
 	if err := i.ImCtx.SetCurrent(); err != nil {
-		asserts.T(false, "Setting imgui ctx as current failed. Err: "+err.Error())
+		assert.T(false, "Setting imgui ctx as current failed. Err: "+err.Error())
 	}
 
 	imIO := imgui.CurrentIO()
@@ -36,7 +36,7 @@ func (i *ImguiInfo) FrameStart(winWidth, winHeight float32) {
 func (i *ImguiInfo) Render(winWidth, winHeight float32, fbWidth, fbHeight int32) {
 
 	if err := i.ImCtx.SetCurrent(); err != nil {
-		asserts.T(false, "Setting imgui ctx as current failed. Err: "+err.Error())
+		assert.T(false, "Setting imgui ctx as current failed. Err: "+err.Error())
 	}
 
 	imgui.Render()
@@ -66,8 +66,7 @@ func (i *ImguiInfo) Render(winWidth, winHeight float32, fbWidth, fbHeight int32)
 	// DisplayMin is typically (0,0) for single viewport apps.
 
 	i.Mat.Bind()
-
-	gl.Uniform1i(gl.GetUniformLocation(i.Mat.ShaderProg.ID, gl.Str("Texture\x00")), 0)
+	i.Mat.SetUnifInt32("Texture", 0)
 
 	//PERF: only update the ortho matrix on window resize
 	orthoMat := gglm.Ortho(0, float32(winWidth), 0, float32(winHeight), 0, 20)