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Camera package+ rename asserts->assert

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This commit is contained in:
bloeys
2022-07-23 22:51:57 +04:00
parent b85056dd31
commit 52b77e017e
9 changed files with 195 additions and 76 deletions
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2
asserts/asserts.go → assert/assert.go
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@ -1,4 +1,4 @@
package asserts
package assert
import (
"github.com/bloeys/nmage/consts"

4
buffers/buf_usage.go
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@ -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
}

10
buffers/element.go
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@ -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
}
}

96
camera/camera.go Executable file
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@ -0,0 +1,96 @@
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
Target 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 and projection matrices
func (c *Camera) Update() {
c.ViewMat = gglm.LookAt(&c.Pos, &c.Target, &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
}
}
func (c *Camera) LookAt(targetPos, worldUp *gglm.Vec3) {
c.Target = *targetPos
c.WorldUp = *worldUp
c.Update()
}
func NewPerspective(pos, targetPos, worldUp *gglm.Vec3, nearClip, farClip, fovRadians, aspectRatio float32) *Camera {
cam := &Camera{
Type: Type_Perspective,
Pos: *pos,
// Forward: *gglm.NewVec3(0, 0, 1),
Target: *targetPos,
WorldUp: *worldUp,
NearClip: nearClip,
FarClip: farClip,
Fov: fovRadians,
AspectRatio: aspectRatio,
}
cam.Update()
return cam
}
func NewOrthographic(pos, targetPos, worldUp *gglm.Vec3, nearClip, farClip, left, right, top, bottom float32) *Camera {
cam := &Camera{
Type: Type_Orthographic,
Pos: *pos,
// Forward: *gglm.NewVec3(0, 0, 0),
Target: *targetPos,
WorldUp: *worldUp,
NearClip: nearClip,
FarClip: farClip,
Left: left,
Right: right,
Top: top,
Bottom: bottom,
}
cam.Update()
return cam
}

6
engine/engine.go
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@ -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)

121
main.go
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@ -6,6 +6,7 @@ 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/input"
"github.com/bloeys/nmage/logging"
@ -18,8 +19,7 @@ import (
"github.com/veandco/go-sdl2/sdl"
)
//TODO: Tasks:
// Camera class
// @Todo:
// Entities and components
// Integrate physx
// Create VAO struct independent from VBO to support multi-VBO use cases (e.g. instancing)
@ -34,13 +34,12 @@ import (
var (
window *engine.Window
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)
lightPos1 = gglm.NewVec3(2, 2, 0)
lightColor1 = gglm.NewVec3(1, 1, 1)
@ -51,6 +50,48 @@ type OurGame struct {
ImGUIInfo nmageimgui.ImguiInfo
}
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(),
}
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
@ -80,16 +121,24 @@ func (g *OurGame) Init() {
modelMat.Mul(translationMat.Mul(rotMat.Mul(scaleMat)))
simpleMat.SetUnifMat4("modelMat", &modelMat.Mat4)
//Moves objects into the cameras view
updateViewMat()
// Camera
winWidth, winHeight := g.Win.SDLWin.GetSize()
cam = camera.NewPerspective(
gglm.NewVec3(0, 0, -10),
gglm.NewVec3(0, 0, -9),
gglm.NewVec3(0, 1, 0),
0.1, 20,
45*gglm.Deg2Rad,
float32(winWidth)/float32(winHeight),
)
simpleMat.SetUnifMat4("projMat", &cam.ProjMat)
//Perspective/Depth
projMat := gglm.Perspective(45*gglm.Deg2Rad, float32(1280)/float32(720), 0.1, 500)
simpleMat.SetUnifMat4("projMat", projMat)
updateViewMat()
//Lights
simpleMat.SetUnifVec3("lightPos1", lightPos1)
simpleMat.SetUnifVec3("lightColor1", lightColor1)
}
func (g *OurGame) Update() {
@ -98,34 +147,30 @@ func (g *OurGame) Update() {
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()
cam.Pos.AddY(camSpeed * timing.DT())
updateViewMat()
}
if input.KeyDown(sdl.K_s) {
camPos.Data[1] -= camSpeed * timing.DT()
cam.Pos.AddY(-camSpeed * timing.DT())
updateViewMat()
}
if input.KeyDown(sdl.K_d) {
camPos.Data[0] += camSpeed * timing.DT()
cam.Pos.AddX(camSpeed * timing.DT())
updateViewMat()
}
if input.KeyDown(sdl.K_a) {
camPos.Data[0] -= camSpeed * timing.DT()
cam.Pos.AddX(-camSpeed * timing.DT())
updateViewMat()
}
if input.GetMouseWheelYNorm() > 0 {
camPos.Data[2] += 1
cam.Pos.AddZ(1)
updateViewMat()
} else if input.GetMouseWheelYNorm() < 0 {
camPos.Data[2] -= 1
cam.Pos.AddZ(-1)
updateViewMat()
}
@ -135,7 +180,7 @@ func (g *OurGame) Update() {
simpleMat.SetUnifMat4("modelMat", &modelMat.Mat4)
}
imgui.DragFloat3("Cam Pos", &camPos.Data)
imgui.DragFloat3("Cam Pos", &cam.Pos.Data)
}
func (g *OurGame) Render() {
@ -161,33 +206,11 @@ 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)
target := cam.Pos.Clone()
target.AddZ(1)
cam.Target = *target
cam.Update()
simpleMat.SetUnifMat4("viewMat", &cam.ViewMat)
}

6
materials/material.go
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@ -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
}

18
meshes/mesh.go
View File

@ -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 +31,7 @@ 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")
assert.T(len(sceneMesh.TexCoords[0]) > 0, "Mesh has no UV0")
layoutToUse := []buffers.Element{{ElementType: buffers.DataTypeVec3}, {ElementType: buffers.DataTypeVec3}, {ElementType: buffers.DataTypeVec2}}
if len(sceneMesh.ColorSets) > 0 && len(sceneMesh.ColorSets[0]) > 0 {
@ -73,9 +73,9 @@ 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 +88,8 @@ 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 +104,7 @@ 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
@ -152,7 +152,7 @@ func flattenVec4(vec4s []gglm.Vec4) []float32 {
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++ {

6
ui/imgui/imgui.go
View File

@ -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()