func (b bbox) Contains(pos mgl32.Vec3) bool {
return pos.X() > b[0].X() &&
pos.Y() > b[0].Y() &&
pos.Z() > b[0].Z() &&
pos.X() < b[1].X() &&
pos.Y() < b[1].Y() &&
pos.Z() < b[1].Z()
}
// Rotate adjusts the direction vectors by a delta vector of {pitch, yaw, roll}.
// Roll is ignored for now.
func (c *EulerCamera) Rotate(delta mgl.Vec3) {
c.yaw += float64(delta.Y())
c.pitch += float64(delta.X())
// Limit vertical rotation to avoid gimbal lock
if c.pitch > halfPi {
c.pitch = halfPi
} else if c.pitch < -halfPi {
c.pitch = -halfPi
}
c.updateVectors()
}
func TestTransformSetPosition(t *testing.T) {
transform := NewTransform()
expectedPosition := mgl32.Vec3{5, 10, 3.5}
transform.SetPosition(expectedPosition.X(), expectedPosition.Y(), expectedPosition.Z())
if transform.position != expectedPosition {
t.Errorf("Expected position to be %v got %v", expectedPosition, transform.position)
}
if transform.matrix[12] != expectedPosition.X() ||
transform.matrix[13] != expectedPosition.Y() ||
transform.matrix[14] != expectedPosition.Z() {
t.Error("Matrix was not updated correctly after translation.")
}
}
func TestTransformScale(t *testing.T) {
transform := NewTransform()
scale := mgl32.Vec3{2, 2, 2}
transform.Scale(scale.X(), scale.Y(), scale.Z())
if transform.scale != scale {
t.Errorf("Expected scale to be %v got %v", scale, transform.scale)
}
if transform.matrix[0] != scale.X() ||
transform.matrix[5] != scale.Y() ||
transform.matrix[10] != scale.Z() {
t.Error("Matrix was not updated correctly after translation.")
}
}
func findFace(bound vmath.AABB, at mgl32.Vec3) direction.Type {
switch {
case bound.Min.X() == at.X():
return direction.West
case bound.Max.X() == at.X():
return direction.East
case bound.Min.Y() == at.Y():
return direction.Down
case bound.Max.Y() == at.Y():
return direction.Up
case bound.Min.Z() == at.Z():
return direction.North
case bound.Max.Z() == at.Z():
return direction.South
}
return direction.Up
}
func TestTransformTranslate(t *testing.T) {
transform := NewTransform()
transform.SetPosition(10, 10, 10)
vector := mgl32.Vec3{-5, 6, 3}
expected := mgl32.Vec3{5, 16, 13}
transform.Translate(vector)
if transform.position != expected {
t.Errorf("Expected position to be %v got %v", expected, transform.position)
}
if transform.matrix[12] != expected.X() ||
transform.matrix[13] != expected.Y() ||
transform.matrix[14] != expected.Z() {
t.Error("Matrix was not updated correctly after translation.")
}
}
// NewPianoKey returns a key for our piano.
func NewPianoKey(pos mgl32.Vec3, lightColor mgl32.Vec3, white bool, freq float32) PianoKey {
var color mgl32.Vec4
var keySize float32
if white {
color = mgl32.Vec4{0.98, 0.97, 0.94}
keySize = 2
} else {
color = mgl32.Vec4{0.1, 0.1, 0.1, 1.0}
keySize = 1
}
pk := PianoKey{Pos: pos, Angle: 0, Color: color, Frequency: freq, Finger: -1, white: white, LightColor: lightColor}
pk.BBox[0] = pos.Sub(mgl32.Vec3{0.5, 0.6, keySize})
pk.BBox[1] = pos.Add(mgl32.Vec3{0.5, 0.6, keySize})
pk.source = al.GenSources(1)[0]
pk.source.SetGain(1.0)
pk.source.SetPosition(al.Vector{pos.X(), pos.Y(), pos.Z()})
pk.source.SetVelocity(al.Vector{})
pk.buffers = al.GenBuffers(3)
var samples [1024 * 16]int16
sampleRate := 44100
amplitude := float32(0.8 * 0x7FFF)
for i := 0; i < len(samples); i++ {
val := f32.Sin((2.0 * math.Pi * freq) / float32(sampleRate) * float32(i))
samples[i] = int16(amplitude * val)
}
buf := &bytes.Buffer{}
binary.Write(buf, binary.LittleEndian, &samples)
pk.buffers[0].BufferData(al.FormatMono16, buf.Bytes(), 44100)
f, _ := os.Create("audio.raw")
binary.Write(f, binary.LittleEndian, &samples)
f.Close()
return pk
}
func (a AABB) MoveOutOf(o AABB, dir mgl32.Vec3) AABB {
if dir.X() != 0 {
if dir.X() > 0 {
ox := a.Max.X()
a.Max[0] = o.Min.X() - 0.0001
a.Min[0] += a.Max.X() - ox
} else {
ox := a.Min.X()
a.Min[0] = o.Max.X() + 0.0001
a.Max[0] += a.Min.X() - ox
}
}
if dir.Y() != 0 {
if dir.Y() > 0 {
oy := a.Max.Y()
a.Max[1] = o.Min.Y() - 0.0001
a.Min[1] += a.Max.Y() - oy
} else {
oy := a.Min.Y()
a.Min[1] = o.Max.Y() + 0.0001
a.Max[1] += a.Min.Y() - oy
}
}
if dir.Z() != 0 {
if dir.Z() > 0 {
oz := a.Max.Z()
a.Max[2] = o.Min.Z() - 0.0001
a.Min[2] += a.Max.Z() - oz
} else {
oz := a.Min.Z()
a.Min[2] = o.Max.Z() + 0.0001
a.Max[2] += a.Min.Z() - oz
}
}
return a
}
func programLoop(window *win.Window) error {
// the linked shader program determines how the data will be rendered
vertShader, err := gfx.NewShaderFromFile("shaders/phong.vert", gl.VERTEX_SHADER)
if err != nil {
return err
}
fragShader, err := gfx.NewShaderFromFile("shaders/phong.frag", gl.FRAGMENT_SHADER)
if err != nil {
return err
}
program, err := gfx.NewProgram(vertShader, fragShader)
if err != nil {
return err
}
defer program.Delete()
lightFragShader, err := gfx.NewShaderFromFile("shaders/light.frag", gl.FRAGMENT_SHADER)
if err != nil {
return err
}
// special shader program so that lights themselves are not affected by lighting
lightProgram, err := gfx.NewProgram(vertShader, lightFragShader)
if err != nil {
return err
}
VAO := createVAO(cubeVertices, nil)
lightVAO := createVAO(cubeVertices, nil)
// ensure that triangles that are "behind" others do not draw over top of them
gl.Enable(gl.DEPTH_TEST)
camera := cam.NewFpsCamera(mgl32.Vec3{0, 0, 3}, mgl32.Vec3{0, 1, 0}, -90, 0, window.InputManager())
for !window.ShouldClose() {
// swaps in last buffer, polls for window events, and generally sets up for a new render frame
window.StartFrame()
// update camera position and direction from input evevnts
camera.Update(window.SinceLastFrame())
// background color
gl.ClearColor(0, 0, 0, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) // depth buffer needed for DEPTH_TEST
// cube rotation matrices
rotateX := (mgl32.Rotate3DX(mgl32.DegToRad(-45 * float32(glfw.GetTime()))))
rotateY := (mgl32.Rotate3DY(mgl32.DegToRad(-45 * float32(glfw.GetTime()))))
rotateZ := (mgl32.Rotate3DZ(mgl32.DegToRad(-45 * float32(glfw.GetTime()))))
// creates perspective
fov := float32(60.0)
projectTransform := mgl32.Perspective(mgl32.DegToRad(fov),
float32(window.Width())/float32(window.Height()),
0.1,
100.0)
camTransform := camera.GetTransform()
lightPos := mgl32.Vec3{0.6, 1, 0.1}
lightTransform := mgl32.Translate3D(lightPos.X(), lightPos.Y(), lightPos.Z()).Mul4(
mgl32.Scale3D(0.2, 0.2, 0.2))
program.Use()
gl.UniformMatrix4fv(program.GetUniformLocation("view"), 1, false, &camTransform[0])
gl.UniformMatrix4fv(program.GetUniformLocation("project"), 1, false,
&projectTransform[0])
gl.BindVertexArray(VAO)
// draw each cube after all coordinate system transforms are bound
// obj is colored, light is white
gl.Uniform3f(program.GetUniformLocation("material.ambient"), 1.0, 0.5, 0.31)
gl.Uniform3f(program.GetUniformLocation("material.diffuse"), 1.0, 0.5, 0.31)
gl.Uniform3f(program.GetUniformLocation("material.specular"), 0.5, 0.5, 0.5)
gl.Uniform1f(program.GetUniformLocation("material.shininess"), 32.0)
lightColor := mgl32.Vec3{
float32(math.Sin(glfw.GetTime() * 1)),
float32(math.Sin(glfw.GetTime() * 0.35)),
float32(math.Sin(glfw.GetTime() * 0.65)),
}
diffuseColor := mgl32.Vec3{
0.5 * lightColor[0],
0.5 * lightColor[1],
0.5 * lightColor[2],
}
ambientColor := mgl32.Vec3{
0.2 * lightColor[0],
0.2 * lightColor[1],
0.2 * lightColor[2],
}
gl.Uniform3f(program.GetUniformLocation("light.ambient"),
ambientColor[0], ambientColor[1], ambientColor[2])
gl.Uniform3f(program.GetUniformLocation("light.diffuse"),
diffuseColor[0], diffuseColor[1], diffuseColor[2])
gl.Uniform3f(program.GetUniformLocation("light.specular"), 1.0, 1.0, 1.0)
gl.Uniform3f(program.GetUniformLocation("light.position"), lightPos.X(), lightPos.Y(), lightPos.Z())
for _, pos := range cubePositions {
// turn the cubes into rectangular prisms for more fun
worldTranslate := mgl32.Translate3D(pos[0], pos[1], pos[2])
worldTransform := worldTranslate.Mul4(
rotateX.Mul3(rotateY).Mul3(rotateZ).Mat4(),
)
gl.UniformMatrix4fv(program.GetUniformLocation("model"), 1, false,
&worldTransform[0])
gl.DrawArrays(gl.TRIANGLES, 0, 36)
}
gl.BindVertexArray(0)
// Draw the light obj after the other boxes using its separate shader program
// this means that we must re-bind any uniforms
lightProgram.Use()
gl.BindVertexArray(lightVAO)
gl.UniformMatrix4fv(lightProgram.GetUniformLocation("model"), 1, false, &lightTransform[0])
gl.UniformMatrix4fv(lightProgram.GetUniformLocation("view"), 1, false, &camTransform[0])
gl.UniformMatrix4fv(lightProgram.GetUniformLocation("project"), 1, false, &projectTransform[0])
gl.DrawArrays(gl.TRIANGLES, 0, 36)
gl.BindVertexArray(0)
// end of draw loop
}
return nil
}
func randomVector(min, max mgl32.Vec3) mgl32.Vec3 {
r1, r2, r3 := rand.Float32(), rand.Float32(), rand.Float32()
return mgl32.Vec3{min.X()*(1.0-r1) + max.X()*r1, min.Y()*(1.0-r2) + max.Y()*r2, min.Z()*(1.0-r3) + max.Z()*r3}
}
//
// objectToObjectData
// Turns the data from .obj format into an internal OpenGL friendly
// format. The following information needs to be created for each mesh.
//
// mesh.V = append(mesh.V, ...4-float32) - indexed from 0
// mesh.N = append(mesh.N, ...3-float32) - indexed from 0
// mesh.T = append(mesh.T, ...2-float32) - indexed from 0
// mesh.F = append(mesh.F, ...3-uint16) - refers to above zero indexed values
//
// objectData holds the global vertex, texture, and normal point information.
// faces are the indexes for this mesh.
//
// Additionally the normals at each vertex are generated as the sum of the
// normals for each face that shares that vertex.
//
// @param name (string) The Name of the Object.
// @param objectData (*objectData) A temporary object data pointer.
// @param objectData (*objectData) The array of Faces / Indices.
//
// @return data (*ObjectData) A pointer to the Object.
// @return error (error) the error (if any)
//
func (loader *Loader) objectToObjectData(name string, objectData *objectData, faces []face) (data *ObjectData, err error) {
data = &ObjectData{}
data.Name = name
vmap := make(map[string]int) // the unique vertex data points for this face.
vcnt := -1
// process each vertex of each face. Each one represents a combination vertex,
// texture coordinate, and normal.
for _, face := range faces {
for pi := 0; pi < 3; pi++ { // Load only triangles
// for pi, _ := range face.s {
v, t, n := -1, -1, -1
if len(face.s) > pi {
faceIndex := face.s[pi]
if v, t, n, err = parseFaceIndices(faceIndex); err != nil {
return data, fmt.Errorf("Could not parse face data %s", err)
}
// cut down the amount of information passed around by reusing points
// where the vertex and the texture coordinate information is the same.
vertexIndex := fmt.Sprintf("%d/%d/%d", v, t, n)
if _, ok := vmap[vertexIndex]; !ok {
// add a new data point.
vcnt++
vmap[vertexIndex] = vcnt
data.Vertex = append(data.Vertex, objectData.vertices[v].x, objectData.vertices[v].y, objectData.vertices[v].z)
// Object might not have normals
if n != -1 {
data.Normals = append(data.Normals, objectData.normals[n].x, objectData.normals[n].y, objectData.normals[n].z)
}
// Object might not have texture information
if t != -1 {
data.Coordinates = append(data.Coordinates, objectData.texture[t].u, objectData.texture[t].v)
}
} else {
// update the normal at the vertex to be a combination of
// all the normals of each face that shares the vertex.
ni := vmap[vertexIndex] * 3
// Obj might not have normals
if n != -1 && len(data.Normals) > (ni+2) {
var n1 mgl32.Vec3 = mgl32.Vec3{
float32(data.Normals[ni]),
float32(data.Normals[ni+1]),
float32(data.Normals[ni+2]),
}
var n2 mgl32.Vec3 = mgl32.Vec3{
float32(objectData.normals[n].x),
float32(objectData.normals[n].y),
float32(objectData.normals[n].z),
}
n2 = n2.Add(n1).Normalize()
data.Normals[ni], data.Normals[ni+1], data.Normals[ni+2] = float32(n2.X()), float32(n2.Y()), float32(n2.Z())
}
}
data.Faces = append(data.Faces, uint16(vmap[vertexIndex]))
}
}
}
return data, err
}
func (i *Instance) SetPosition(p mgl32.Vec3) {
if i.position.X() != p.X() || i.position.Y() != p.Y() || i.position.Z() != p.Z() {
i.position = p
i.dirty = true
}
}
func traceRay(max float32, s, d mgl32.Vec3, cb func(x, y, z int) bool) {
type gen struct {
count int
base, d float32
}
newGen := func(start, d float32) *gen {
g := &gen{}
if d > 0 {
g.base = (float32(math.Ceil(float64(start))) - start) / d
} else if d < 0 {
d = float32(math.Abs(float64(d)))
g.base = (start - float32(math.Floor(float64(start)))) / d
}
g.d = d
return g
}
next := func(g *gen) float32 {
g.count++
if g.d == 0 {
return float32(math.Inf(1))
}
return g.base + float32(g.count-1)/g.d
}
aGen := newGen(s.X(), d.X())
bGen := newGen(s.Y(), d.Y())
cGen := newGen(s.Z(), d.Z())
nextNA := next(aGen)
nextNB := next(bGen)
nextNC := next(cGen)
x, y, z := int(math.Floor(float64(s.X()))), int(math.Floor(float64(s.Y()))), int(math.Floor(float64(s.Z())))
for {
if !cb(x, y, z) {
return
}
nextN := float32(0.0)
if nextNA <= nextNB {
if nextNA <= nextNC {
nextN = nextNA
nextNA = next(aGen)
x += int(math.Copysign(1, float64(d.X())))
} else {
nextN = nextNC
nextNC = next(cGen)
z += int(math.Copysign(1, float64(d.Z())))
}
} else {
if nextNB <= nextNC {
nextN = nextNB
nextNB = next(bGen)
y += int(math.Copysign(1, float64(d.Y())))
} else {
nextN = nextNC
nextNC = next(cGen)
z += int(math.Copysign(1, float64(d.Z())))
}
}
if nextN > max {
break
}
}
}
func Vector3bytes(w io.Writer, vector mgl32.Vec3) {
Float32bytes(w, vector.X())
Float32bytes(w, vector.Y())
Float32bytes(w, vector.Z())
}
func inBox(Hit, B1, B2 mgl32.Vec3, Axis int) bool {
if Axis == 1 && Hit.Z() > B1.Z() && Hit.Z() < B2.Z() && Hit.Y() > B1.Y() && Hit.Y() < B2.Y() {
return true
}
if Axis == 2 && Hit.Z() > B1.Z() && Hit.Z() < B2.Z() && Hit.X() > B1.X() && Hit.X() < B2.X() {
return true
}
if Axis == 3 && Hit.X() > B1.X() && Hit.X() < B2.X() && Hit.Y() > B1.Y() && Hit.Y() < B2.Y() {
return true
}
return false
}
// returns true if line (L1, L2) intersects with the box (B1, B2)
// returns intersection point in Hit
func checkLineBox(B1, B2, L1, L2 mgl32.Vec3) (bool, mgl32.Vec3) {
var Hit mgl32.Vec3
if L2.X() < B1.X() && L1.X() < B1.X() {
return false, mgl32.Vec3{}
}
if L2.X() > B2.X() && L1.X() > B2.X() {
return false, mgl32.Vec3{}
}
if L2.Y() < B1.Y() && L1.Y() < B1.Y() {
return false, mgl32.Vec3{}
}
if L2.Y() > B2.Y() && L1.Y() > B2.Y() {
return false, mgl32.Vec3{}
}
if L2.Z() < B1.Z() && L1.Z() < B1.Z() {
return false, mgl32.Vec3{}
}
if L2.Z() > B2.Z() && L1.Z() > B2.Z() {
return false, mgl32.Vec3{}
}
if L1.X() > B1.X() && L1.X() < B2.X() &&
L1.Y() > B1.Y() && L1.Y() < B2.Y() &&
L1.Z() > B1.Z() && L1.Z() < B2.Z() {
Hit = L1
return true, Hit
}
if (getIntersection(L1.X()-B1.X(), L2.X()-B1.X(), L1, L2, &Hit) && inBox(Hit, B1, B2, 1)) ||
(getIntersection(L1.Y()-B1.Y(), L2.Y()-B1.Y(), L1, L2, &Hit) && inBox(Hit, B1, B2, 2)) ||
(getIntersection(L1.Z()-B1.Z(), L2.Z()-B1.Z(), L1, L2, &Hit) && inBox(Hit, B1, B2, 3)) ||
(getIntersection(L1.X()-B2.X(), L2.X()-B2.X(), L1, L2, &Hit) && inBox(Hit, B1, B2, 1)) ||
(getIntersection(L1.Y()-B2.Y(), L2.Y()-B2.Y(), L1, L2, &Hit) && inBox(Hit, B1, B2, 2)) ||
(getIntersection(L1.Z()-B2.Z(), L2.Z()-B2.Z(), L1, L2, &Hit) && inBox(Hit, B1, B2, 3)) {
return true, Hit
}
return false, mgl32.Vec3{}
}
func playSoundInternal(cat soundCategory, snd sound, vol, pitch float64, rel bool, pos mgl32.Vec3, cb func()) {
vol *= snd.Volume * 100
baseVol := vol
vol *= float64(muVolMaster.Value()) / 100
if v, ok := volVars[cat]; ok {
vol *= float64(v.Value()) / 100
}
if vol <= 0 {
if cb != nil {
go func() { syncChan <- cb }()
}
return
}
name := snd.Name
key := pluginKey{"minecraft", name}
sb, ok := loadedSounds[key]
if !ok {
f, err := resource.Open("minecraft", "sounds/"+name+".ogg")
if err != nil {
v, ok := assets.Objects[fmt.Sprintf("minecraft/sounds/%s.ogg", name)]
if !ok {
console.Text("Missing sound %s", key)
if cb != nil {
cb()
}
return
}
loc := fmt.Sprintf("./resources/%s", hashPath(v.Hash))
f, err = os.Open(loc)
if err != nil {
console.Text("Missing sound %s", key)
if cb != nil {
cb()
}
return
}
}
if snd.Stream {
m := audio.NewMusic(f)
m.SetVolume(vol)
m.SetPitch(pitch)
m.Play()
currentMusic = append(currentMusic, music{Music: m, cb: cb, cat: cat, vol: baseVol})
return
}
defer f.Close()
data, err := ioutil.ReadAll(f)
if err != nil {
panic(err)
}
sb = audio.NewSoundBufferData(data)
loadedSounds[key] = sb
}
var s audio.Sound
n := true
for _, sn := range soundList {
if sn.Status() == audio.StatStopped {
s = sn
n = false
break
}
}
if n {
if len(soundList) >= 100 {
console.Component(
format.Build("WARN: Skipping playing sound due to limit").
Color(format.Yellow).Create(),
)
return
}
s = audio.NewSound()
soundList = append(soundList, s)
}
s.SetBuffer(sb)
s.SetVolume(vol)
s.SetMinDistance(5)
s.SetAttenuation(0.008)
s.SetPitch(pitch)
s.Play()
if rel {
s.SetRelative(true)
s.SetPosition(pos.X(), pos.Y(), pos.Z())
} else {
s.SetRelative(false)
}
}
// IntersectGeometry - returns a list of line segments resulting from the xz plane intersection of the geometry
func IntersectGeometry(geometry *renderer.Geometry) [][2]mgl32.Vec2 {
segments := make([][2]mgl32.Vec2, 0)
for i := 0; i < len(geometry.Indicies); i = i + 3 {
index := geometry.Indicies[i]
v1 := mgl32.Vec3{geometry.Verticies[index*renderer.VertexStride], geometry.Verticies[index*renderer.VertexStride+1], geometry.Verticies[index*renderer.VertexStride+2]}
index = geometry.Indicies[i+1]
v2 := mgl32.Vec3{geometry.Verticies[index*renderer.VertexStride], geometry.Verticies[index*renderer.VertexStride+1], geometry.Verticies[index*renderer.VertexStride+2]}
index = geometry.Indicies[i+2]
v3 := mgl32.Vec3{geometry.Verticies[index*renderer.VertexStride], geometry.Verticies[index*renderer.VertexStride+1], geometry.Verticies[index*renderer.VertexStride+2]}
va, vb, vc := v1, v2, v3
if (v1.Y() < 0 && v2.Y() > 0 && v3.Y() > 0) || (v1.Y() > 0 && v2.Y() < 0 && v3.Y() < 0) {
va, vb, vc = v1, v2, v3
} else if (v1.Y() > 0 && v2.Y() < 0 && v3.Y() > 0) || (v1.Y() < 0 && v2.Y() > 0 && v3.Y() < 0) {
va, vb, vc = v2, v1, v3
} else if (v1.Y() > 0 && v2.Y() > 0 && v3.Y() < 0) || (v1.Y() < 0 && v2.Y() < 0 && v3.Y() > 0) {
va, vb, vc = v3, v2, v1
} else {
continue
}
t_ab := -va.Y() / (va.Y() - vb.Y())
t_ac := -va.Y() / (va.Y() - vc.Y())
segments = append(segments, [2]mgl32.Vec2{
mgl32.Vec2{va.X() + (va.X()-vb.X())*t_ab, va.Z() + (va.Z()-vb.Z())*t_ab},
mgl32.Vec2{va.X() + (va.X()-vc.X())*t_ac, va.Z() + (va.Z()-vc.Z())*t_ac},
})
}
return segments
}
func (i *Instance) SetScale(s mgl32.Vec3) {
if i.scale.X() != s.X() || i.scale.Y() != s.Y() || i.scale.Z() != s.Z() {
i.scale = s
i.dirty = true
}
}