// RotateTo adjusts the yaw and pitch to face a point.
func (c *QuatCamera) RotateTo(center mgl.Vec3) {
direction := center.Sub(c.position).Normalize()
right := direction.Cross(AxisUp)
up := right.Cross(direction)
c.rotation = mgl.QuatLookAtV(c.position, center, up)
}
func safeNormalize(v mgl32.Vec3) mgl32.Vec3 {
v = v.Normalize()
if math.IsInf(float64(v[0]), 0) || math.IsNaN(float64(v[0])) {
return mgl32.Vec3{}
}
return v
}
func (e *Editor) MoveSelectedNodeModel(x, y float32, axisLock mgl32.Vec3) {
selectedModel, _ := e.overviewMenu.getSelectedNode(e.currentMap.Root)
if selectedModel != nil {
selectedModel.Translation = selectedModel.Translation.Add(axisLock.Mul(x * mouseSpeed))
}
updateMap(e.currentMap.Root)
}
//PointToLineDist distance from line (a,b) to point
func PointToLineDist(a, b, point mgl32.Vec3) float32 {
ab := b.Sub(a)
ap := point.Sub(a)
prj := ap.Dot(ab)
lenSq := ab.Dot(ab)
t := prj / lenSq
return ab.Mul(t).Add(a).Sub(point).Len()
}
func (f *fPlane) setPoints(v1, v2, v3 mgl32.Vec3) {
aux1 := v1.Sub(v2)
aux2 := v3.Sub(v2)
f.N = aux2.Cross(aux1)
f.N = safeNormalize(f.N)
f.P = v2
f.D = -(f.N.Dot(f.P))
}
// Lerp will interpolate between the desired position/center by amount.
func (c *QuatCamera) Lerp(position mgl.Vec3, center mgl.Vec3, amount float32) {
direction := center.Sub(position).Normalize()
right := direction.Cross(AxisUp)
up := right.Cross(direction)
targetRot := mgl.QuatLookAtV(position, center, up)
c.rotation = mgl.QuatNlerp(c.rotation, targetRot, amount)
c.position = c.position.Add(position.Sub(c.position).Mul(amount))
}
func (self *pane) pix2Vec(evnt *js.Object) mgl32.Vec2 {
v := mgl32.Vec3{ // generate vector from current pixel coords
float32(evnt.Get("clientX").Float()),
float32(evnt.Get("clientY").Float()),
1.0, // apply translations from transform matrix
}
v = self.untransform.Mul3x1(v) // apply pan & zoom untransform matrix
return v.Vec2() // return vec2
}
func getIntersection(fDst1, fDst2 float32, P1, P2 mgl32.Vec3, Hit *mgl32.Vec3) bool {
if (fDst1 * fDst2) >= 0.0 {
return false
}
if fDst1 == fDst2 {
return false
}
*Hit = P1.Add((P2.Sub(P1)).Mul(-fDst1 / (fDst2 - fDst1)))
return true
}
// 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()
}
// CreateBeam - creates a square prism oriented along the vector
func CreateBeam(width float32, vector mgl32.Vec3) *Geometry {
direction := vector.Normalize()
geo := CreateBoxWithOffset(width, width, -width*0.5, -width*0.5)
geo2 := CreateBoxWithOffset(width, width, -width*0.5, -width*0.5)
facingTx := util.Mat4From(mgl32.Vec3{1, 1, 1}, mgl32.Vec3{}, util.FacingOrientation(0, direction, mgl32.Vec3{0, 0, 1}, mgl32.Vec3{1, 0, 0}))
geo.Transform(facingTx)
facingTx = util.Mat4From(mgl32.Vec3{1, 1, 1}, vector, util.FacingOrientation(0, direction, mgl32.Vec3{0, 0, -1}, mgl32.Vec3{1, 0, 0}))
geo2.Optimize(geo, facingTx)
geo.Indicies = append(geo.Indicies, 0, 1, 4, 4, 5, 0) //top
geo.Indicies = append(geo.Indicies, 1, 2, 7, 7, 4, 1) //side
geo.Indicies = append(geo.Indicies, 2, 3, 6, 6, 7, 2) //bottom
geo.Indicies = append(geo.Indicies, 3, 0, 5, 5, 6, 3) //side
return geo
}
func Upvote(tip mgl.Vec3, size float32) []float32 {
a := tip.Add(mgl.Vec3{-size / 2, -size * 2, 0})
b := tip.Add(mgl.Vec3{size / 2, -size, 0})
return []float32{
tip[0], tip[1], tip[2], // Top
tip[0] - size, tip[1] - size, tip[2], // Bottom left
tip[0] + size, tip[1] - size, tip[2], // Bottom right
// Arrow handle
b[0], b[1], b[2], // Top Right
a[0], b[1], a[2], // Top Left
a[0], a[1], a[2], // Bottom Left
a[0], a[1], a[2], // Bottom Left
b[0], b[1], b[2], // Top Right
b[0], a[1], b[2], // Bottom Right
}
}
func (p *fullPiano) GetKeyFromRay(rayStart, rayEnd mgl32.Vec3) *PianoKey {
minDist := float32(10000)
minDistIdx := -1
for i, k := range p.Keys {
hit, pos := k.Hit(rayStart, rayEnd)
if hit {
dist := rayStart.Sub(pos).Len()
if dist < minDist {
minDistIdx = i
minDist = dist
}
}
}
if minDistIdx != -1 {
return &p.Keys[minDistIdx]
}
return nil
}
//PointToPlaneDist distance from plane (a,b,c) to point
func PointToPlaneDist(a, b, c, point mgl32.Vec3) float32 {
ab := b.Sub(a)
ac := c.Sub(a)
ap := point.Sub(a)
normal := ac.Cross(ab).Normalize()
return float32(math.Abs(float64(ap.Dot(normal))))
}
// 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
}
// updates the Colors of the model to fake lighting
func esLightModel(p PositionComponent, s SizeComponent, m interface {
Model() *render.StaticModel
}) {
if m.Model() == nil {
return
}
xx, yy, zz := p.Position()
bounds := s.Bounds()
bounds = bounds.Shift(float32(xx), float32(yy), float32(zz))
c := mgl32.Vec3{float32(xx), float32(yy), float32(zz)}
c[1] += bounds.Max.Sub(bounds.Min).Mul(0.5).Y()
var light, skyLight float32
var count float32
for y := bounds.Min.Y(); y <= bounds.Max.Y(); y++ {
for z := bounds.Min.Z() - 1; z <= bounds.Max.Z()+1; z++ {
for x := bounds.Min.X() - 1; x <= bounds.Max.X()+1; x++ {
bx, by, bz := int(math.Floor(float64(x))), int(math.Floor(float64(y))), int(math.Floor(float64(z)))
bl := float32(chunkMap.BlockLight(bx, by, bz))
sl := float32(chunkMap.SkyLight(bx, by, bz))
dist := 1.0 - c.Sub(mgl32.Vec3{float32(bx) + 0.5, float32(by) + 0.5, float32(bz) + 0.5}).Len()
if dist < 0 {
continue
}
light += bl * dist
skyLight += sl * dist
count += dist
}
}
}
light /= count
skyLight /= count
model := m.Model()
model.BlockLight, model.SkyLight = light, skyLight
}
// Calculate normals by using cross products along the triangle strips
// and averaging the normals for each vertex
func (terrain *Terrain) CalculateNormals() {
var element_pos uint32 = 0
var AB, AC, cross_product mgl32.Vec3
// Loop through each triangle strip
for x := uint32(0); x < terrain.XSize-1; x++ {
// Loop along the strip
for tri := uint32(0); tri < terrain.ZSize*2-2; tri++ {
// Extract the vertex indices from the element array
v1 := terrain.Indices[element_pos]
v2 := terrain.Indices[element_pos+1]
v3 := terrain.Indices[element_pos+2]
// Define the two vectors for the triangle
AB = terrain.Vertices[v2].Sub(terrain.Vertices[v1])
AC = terrain.Vertices[v3].Sub(terrain.Vertices[v1])
// Calculate the cross product
cross_product = AB.Cross(AC)
// Add this normal to the vertex normal for all three vertices in the triangle
terrain.Normals[v1] = terrain.Normals[v1].Add(cross_product)
terrain.Normals[v2] = terrain.Normals[v2].Add(cross_product)
terrain.Normals[v3] = terrain.Normals[v3].Add(cross_product)
// Move on to the next vertex along the strip
element_pos++
}
// Jump past the lat two element positions to reach the start of the strip
element_pos += 2
}
// Normalise the normals
for v := uint32(0); v < terrain.XSize*terrain.ZSize; v++ {
terrain.Normals[v] = terrain.Normals[v].Normalize()
}
}
// Draw draws this to the target region.
func (m *Model) Draw(r Region, delta float64) {
if m.isNew || m.isDirty() || forceDirty {
m.isNew = false
data := m.data[:0]
for _, v := range m.verts {
vec := mgl32.Vec3{v.X - 0.5, v.Y - 0.5, v.Z - 0.5}
vec = m.mat.Mul4x1(vec.Vec4(1)).Vec3().
Add(mgl32.Vec3{0.5, 0.5, 0.5})
vX, vY, vZ := vec[0], 1.0-vec[1], vec[2]
dx := r.X + r.W*float64(vX)
dy := r.Y + r.H*float64(vY)
dx /= scaledWidth
dy /= scaledHeight
data = appendShort(data, int16(math.Floor((dx*float64(lastWidth))+0.5)))
data = appendShort(data, int16(math.Floor((dy*float64(lastHeight))+0.5)))
data = appendShort(data, 256*int16(m.Layer())+int16(256*vZ))
data = appendShort(data, 0)
data = appendUnsignedShort(data, v.TX)
data = appendUnsignedShort(data, v.TY)
data = appendUnsignedShort(data, v.TW)
data = appendUnsignedShort(data, v.TH)
data = appendShort(data, v.TOffsetX)
data = appendShort(data, v.TOffsetY)
data = appendShort(data, v.TAtlas)
data = appendShort(data, 0)
data = appendUnsignedByte(data, v.R)
data = appendUnsignedByte(data, v.G)
data = appendUnsignedByte(data, v.B)
data = appendUnsignedByte(data, v.A)
}
m.data = data
}
render.UIAddBytes(m.data)
}
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.")
}
}
func (f *Frustum) SetCamera(p, l, u mgl32.Vec3) {
Z := p.Sub(l)
Z = safeNormalize(Z)
X := u.Cross(Z)
X = safeNormalize(X)
Y := Z.Cross(X)
nc := p.Sub(Z.Mul(f.near))
fc := p.Sub(Z.Mul(f.far))
ntl := nc.Add(Y.Mul(f.nh)).Sub(X.Mul(f.nw))
ntr := nc.Add(Y.Mul(f.nh)).Add(X.Mul(f.nw))
nbl := nc.Sub(Y.Mul(f.nh)).Sub(X.Mul(f.nw))
nbr := nc.Sub(Y.Mul(f.nh)).Add(X.Mul(f.nw))
ftl := fc.Add(Y.Mul(f.fh)).Sub(X.Mul(f.fw))
ftr := fc.Add(Y.Mul(f.fh)).Add(X.Mul(f.fw))
fbl := fc.Sub(Y.Mul(f.fh)).Sub(X.Mul(f.fw))
fbr := fc.Sub(Y.Mul(f.fh)).Add(X.Mul(f.fw))
const (
top = iota
bottom
left
right
nearP
farP
)
f.planes[top].setPoints(ntr, ntl, ftl)
f.planes[bottom].setPoints(nbl, nbr, fbr)
f.planes[left].setPoints(ntl, nbl, fbl)
f.planes[right].setPoints(nbr, ntr, fbr)
f.planes[nearP].setPoints(ntl, ntr, nbr)
f.planes[farP].setPoints(ftr, ftl, fbl)
}
func (w *Window) SetTranslation(translation mgl32.Vec3) {
w.node.SetTranslation(translation)
w.position = translation.Vec2()
}
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()
}
// 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 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
}
// Draw draws a single frame
func Draw(width, height int, delta float64) {
tickAnimatedTextures(delta)
frameID++
sync:
for {
select {
case f := <-syncChan:
f()
default:
break sync
}
}
// Only update the viewport if the window was resized
if lastHeight != height || lastWidth != width || lastFOV != FOV.Value() {
lastWidth = width
lastHeight = height
lastFOV = FOV.Value()
perspectiveMatrix = mgl32.Perspective(
(math.Pi/180)*float32(lastFOV),
float32(width)/float32(height),
0.1,
500.0,
)
gl.Viewport(0, 0, width, height)
frustum.SetPerspective(
(math.Pi/180)*float32(lastFOV),
float32(width)/float32(height),
0.1,
500.0,
)
initTrans()
}
mainFramebuffer.Bind()
gl.Enable(gl.Multisample)
gl.ActiveTexture(0)
glTexture.Bind(gl.Texture2DArray)
gl.ClearColor(ClearColour.R, ClearColour.G, ClearColour.B, 1.0)
gl.Clear(gl.ColorBufferBit | gl.DepthBufferBit)
chunkProgram.Use()
viewVector = mgl32.Vec3{
float32(math.Cos(Camera.Yaw-math.Pi/2) * -math.Cos(Camera.Pitch)),
float32(-math.Sin(Camera.Pitch)),
float32(-math.Sin(Camera.Yaw-math.Pi/2) * -math.Cos(Camera.Pitch)),
}
cam := mgl32.Vec3{-float32(Camera.X), -float32(Camera.Y), float32(Camera.Z)}
cameraMatrix = mgl32.LookAtV(
cam,
cam.Add(mgl32.Vec3{-viewVector.X(), -viewVector.Y(), viewVector.Z()}),
mgl32.Vec3{0, -1, 0},
)
cameraMatrix = cameraMatrix.Mul4(mgl32.Scale3D(-1.0, 1.0, 1.0))
frustum.SetCamera(
cam,
cam.Add(mgl32.Vec3{-viewVector.X(), -viewVector.Y(), viewVector.Z()}),
mgl32.Vec3{0, -1, 0},
)
shaderChunk.PerspectiveMatrix.Matrix4(&perspectiveMatrix)
shaderChunk.CameraMatrix.Matrix4(&cameraMatrix)
shaderChunk.Texture.Int(0)
shaderChunk.LightLevel.Float(LightLevel)
shaderChunk.SkyOffset.Float(SkyOffset)
chunkPos := position{
X: int(Camera.X) >> 4,
Y: int(Camera.Y) >> 4,
Z: int(Camera.Z) >> 4,
}
nearestBuffer = buffers[chunkPos]
for _, dir := range direction.Values {
validDirs[dir] = viewVector.Dot(dir.AsVec()) > -0.8
}
renderOrder = renderOrder[:0]
renderBuffer(nearestBuffer, chunkPos, direction.Invalid, delta)
drawLines()
drawModels()
clouds.tick(delta)
chunkProgramT.Use()
shaderChunkT.PerspectiveMatrix.Matrix4(&perspectiveMatrix)
shaderChunkT.CameraMatrix.Matrix4(&cameraMatrix)
shaderChunkT.Texture.Int(0)
shaderChunkT.LightLevel.Float(LightLevel)
shaderChunkT.SkyOffset.Float(SkyOffset)
// Copy the depth buffer
mainFramebuffer.BindRead()
transFramebuffer.BindDraw()
gl.BlitFramebuffer(
0, 0, lastWidth, lastHeight,
0, 0, lastWidth, lastHeight,
gl.DepthBufferBit, gl.Nearest,
)
gl.Enable(gl.Blend)
gl.DepthMask(false)
transFramebuffer.Bind()
gl.ClearColor(0, 0, 0, 1)
gl.Clear(gl.ColorBufferBit)
gl.ClearBuffer(gl.Color, 0, []float32{0, 0, 0, 1})
gl.ClearBuffer(gl.Color, 1, []float32{0, 0, 0, 0})
gl.BlendFuncSeparate(gl.OneFactor, gl.OneFactor, gl.ZeroFactor, gl.OneMinusSrcAlpha)
for _, chunk := range renderOrder {
if chunk.countT > 0 && chunk.bufferT.IsValid() {
shaderChunkT.Offset.Int3(chunk.X, chunk.Y*4096-chunk.Y*int(4096*(1-chunk.progress)), chunk.Z)
chunk.arrayT.Bind()
gl.DrawElements(gl.Triangles, chunk.countT, elementBufferType, 0)
}
}
gl.UnbindFramebuffer()
gl.Disable(gl.DepthTest)
gl.Clear(gl.ColorBufferBit)
gl.Disable(gl.Blend)
transDraw()
gl.Enable(gl.DepthTest)
gl.DepthMask(true)
gl.BlendFunc(gl.SrcAlpha, gl.OneMinusSrcAlpha)
gl.Disable(gl.Multisample)
drawUI()
if debugFramebuffers.Value() {
gl.Enable(gl.Multisample)
blitBuffers()
gl.Disable(gl.Multisample)
}
}
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
}
// Since go has multiple return values, I just went ahead and made it return the view and perspective matrices (in that order) rather than messing with getter methods
func (c *Camera) ComputeViewPerspective() (mgl32.Mat4, mgl32.Mat4) {
if mgl64.FloatEqual(-1.0, c.time) {
c.time = glfw.GetTime()
}
currTime := glfw.GetTime()
deltaT := currTime - c.time
xPos, yPos := c.window.GetCursorPosition()
c.window.SetCursorPosition(width/2.0, height/2.0)
c.hAngle += mouseSpeed * ((width / 2.0) - float64(xPos))
c.vAngle += mouseSpeed * ((height / 2.0) - float64(yPos))
dir := mgl32.Vec3{
float32(math.Cos(c.vAngle) * math.Sin(c.hAngle)),
float32(math.Sin(c.vAngle)),
float32(math.Cos(c.vAngle) * math.Cos(c.hAngle))}
right := mgl32.Vec3{
float32(math.Sin(c.hAngle - math.Pi/2.0)),
0.0,
float32(math.Cos(c.hAngle - math.Pi/2.0))}
up := right.Cross(dir)
if c.window.GetKey(glfw.KeyUp) == glfw.Press || c.window.GetKey('W') == glfw.Press {
c.pos = c.pos.Add(dir.Mul(float32(deltaT * speed)))
}
if c.window.GetKey(glfw.KeyDown) == glfw.Press || c.window.GetKey('S') == glfw.Press {
c.pos = c.pos.Sub(dir.Mul(float32(deltaT * speed)))
}
if c.window.GetKey(glfw.KeyRight) == glfw.Press || c.window.GetKey('D') == glfw.Press {
c.pos = c.pos.Add(right.Mul(float32(deltaT * speed)))
}
if c.window.GetKey(glfw.KeyLeft) == glfw.Press || c.window.GetKey('A') == glfw.Press {
c.pos = c.pos.Sub(right.Mul(float32(deltaT * speed)))
}
// Adding to the original tutorial, Space goes up
if c.window.GetKey(glfw.KeySpace) == glfw.Press {
c.pos = c.pos.Add(up.Mul(float32(deltaT * speed)))
}
// Adding to the original tutorial, left control goes down
if c.window.GetKey(glfw.KeyLeftControl) == glfw.Press {
c.pos = c.pos.Sub(up.Mul(float32(deltaT * speed)))
}
fov := initialFOV //- 5.0*float64(glfw.MouseWheel())
proj := mgl32.Perspective(float32(fov), 4.0/3.0, 0.1, 100.0)
view := mgl32.LookAtV(c.pos, c.pos.Add(dir), up)
c.time = currTime
return view, proj
}
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 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}
}
//given 3 vertices, returns the normal of the plane formed by this triangle
//TODO: move to a math package
func NormalToPlane(v1, v2, v3 glm.Vec3) glm.Vec3 {
u := v2.Sub(v1)
v := v3.Sub(v1)
return glm.Vec3{u.Y()*v.Z() - u.Z()*v.Y(), u.Z()*v.X() - u.X()*v.Z(), u.X()*v.Y() - u.Y()*v.X()}
}
func (w *Window) SetScale(scale mgl32.Vec3) {
w.background.SetScale(scale)
w.size = scale.Vec2()
w.Render()
}