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
}
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
}
}
// 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
}
// 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 (p *particle) Tick(force mgl.Vec3) {
p.velocity = force.Add(p.velocity)
p.position = p.position.Add(p.velocity)
}
//
// 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 setupScene(gameEngine engine.Engine, shader *renderer.Shader) {
camera := gameEngine.Camera()
transparentNode := renderer.NewNode()
gameEngine.AddSpatialTransparent(transparentNode)
transparentNode.RendererParams = &renderer.RendererParams{
DepthTest: true,
Unlit: true,
Transparency: renderer.EMISSIVE,
}
// Sky cubemap
skyImg, err := assets.ImportImage("TestAssets/cloudSky.jpg")
if err == nil {
skyImg = imaging.AdjustBrightness(skyImg, -30)
skyImg = imaging.AdjustContrast(skyImg, 30)
geom := renderer.CreateSkyBox()
geom.Transform(mgl32.Scale3D(10000, 10000, 10000))
skyNode := renderer.NewNode()
skyNode.SetOrientation(mgl32.QuatRotate(1.57, mgl32.Vec3{0, 1, 0}))
skyNode.Material = renderer.NewMaterial(renderer.NewTexture("diffuseMap", skyImg, false))
skyNode.RendererParams = renderer.NewRendererParams()
skyNode.RendererParams.CullBackface = false
skyNode.RendererParams.Unlit = true
skyNode.Add(geom)
gameEngine.AddSpatial(skyNode)
// create an environmentMap using the skybox texture
envCubeMap := renderer.NewCubemap("environmentMap", skyImg, true)
gameEngine.DefaultCubeMap(envCubeMap)
}
// load scene objs
objs := []string{
"TestAssets/wellScene/floor.obj",
"TestAssets/wellScene/frame1.obj",
"TestAssets/wellScene/frame2.obj",
"TestAssets/wellScene/well.obj",
"TestAssets/wellScene/torches.obj",
}
for _, objFile := range objs {
if geom, mat, err := assets.ImportObjCached(objFile); err == nil {
sceneNode := renderer.NewNode()
sceneNode.Add(geom)
sceneNode.Material = mat
sceneNode.RendererParams = renderer.NewRendererParams()
sceneNode.RendererParams.CullBackface = false
gameEngine.AddSpatial(sceneNode)
}
}
for i := 0; i < 2; i++ {
torchLocation := mgl32.Vec3{0.86, 1.76, 1.05}
if i == 1 {
torchLocation = mgl32.Vec3{0.86, 1.76, -1.05}
}
fire := fireParticles()
spark := sparkParticles()
torchParticles := effects.NewParticleGroup(camera, fire, spark)
torchParticles.SetTranslation(torchLocation)
transparentNode.Add(torchParticles)
gameEngine.AddUpdatable(torchParticles)
light := renderer.NewLight(renderer.POINT)
light.SetTranslation(torchLocation.Add(mgl32.Vec3{0, 0.05, 0}))
gameEngine.AddLight(light)
var x float64
gameEngine.AddUpdatable(engine.UpdatableFunc(func(dt float64) {
x += dt
mag := float32(math.Abs(0.6*math.Sin(3*x)+0.3*math.Sin(4*x)+0.15*math.Sin(7*x)+0.1*math.Sin(15*x))) + 0.5
mag *= 0.05
light.Color = [3]float32{1 * mag, 0.6 * mag, 0.4 * mag}
}))
}
}
func (c *Camera) Update(dt float32) {
/* Handle keyboard input */
move := false
dir := mgl.Vec3{}
if KeyDown(KeyW) && !KeyDown(KeyS) {
dir[2] += 1
move = true
}
if KeyDown(KeyS) && !KeyDown(KeyW) {
dir[2] -= 1
move = true
}
if KeyDown(KeyA) && !KeyDown(KeyD) {
dir[0] -= 1
move = true
}
if KeyDown(KeyD) && !KeyDown(KeyA) {
dir[0] += 1
move = true
}
if KeyDown(KeyE) && !KeyDown(KeyQ) {
dir[1] += 1
move = true
}
if KeyDown(KeyQ) && !KeyDown(KeyE) {
dir[1] -= 1
move = true
}
if move {
/* Calculate normalized movement vector */
dv := 5.0 * dt /* magic number: movement speed */
dir = dir.Normalize().Mul(dv)
right := c.Transform.Right.Mul(dir[0])
up := mgl.Vec3{0, dir[1], 0}
forward := c.Transform.Forward.Mul(dir[2])
/* Translate camera */
c.Transform.Translate(right.Add(up.Add(forward)))
}
/* Mouse look */
if MouseDown(MouseButton1) {
rx := c.Transform.Rotation[0] - Mouse.DY*0.08
ry := c.Transform.Rotation[1] - Mouse.DX*0.09
/* Camera angle limits */
/* -90 < rx < 90 */
rx = float32(math.Max(-90.0, math.Min(90.0, float64(rx))))
/* -180 < ry < 180 */
if ry > 180.0 {
ry -= 360.0
}
if ry < -180.0 {
ry += 360.0
}
c.Transform.Rotation[0] = rx
c.Transform.Rotation[1] = ry
}
/* Update transform with new position & rotation */
c.Transform.Update(dt)
/* Calculate new view matrix based on forward vector */
lookAt := c.Transform.Position.Add(c.Transform.Forward)
c.View = mgl.LookAtV(c.Transform.Position, lookAt, mgl.Vec3{0, 1, 0})
}
func (rb *RigidBox) SetPosition(position mgl.Vec3) {
rb.body.SetPosition(ToOdeVec3(position.Add(rb.center)))
}