func tickClouds(delta float64) {
if Client != nil && Client.WorldType != wtOverworld {
render.DrawClouds = false
if sunModel != nil {
sunModel.Free()
moonModel.Free()
sunModel = nil
moonModel = nil
}
return
}
render.DrawClouds = true
if Client == nil && Client.entity != nil {
return
}
if sunModel == nil {
genSunModel()
}
phase := int((Client.WorldAge / 24000) % 8)
if phase != moonPhase {
moonPhase = phase
genSunModel()
}
x, y, z := Client.entity.Position()
time := Client.WorldTime / 12000
ox := math.Cos(time*math.Pi) * 300
oy := math.Sin(time*math.Pi) * 300
sunModel.Matrix[0] = mgl32.Translate3D(
float32(x+ox),
-float32(y+oy),
float32(z),
).Mul4(mgl32.Rotate3DZ(-float32(time * math.Pi)).Mat4())
moonModel.Matrix[0] = mgl32.Translate3D(
float32(x-ox),
-float32(y-oy),
float32(z),
).Mul4(mgl32.Rotate3DZ(math.Pi - float32(time*math.Pi)).Mat4())
}
func (this *Transform) GetUpdatedModel() mathgl.Mat4 {
Model := this.model
Model = Model.Mul4(mathgl.Translate3D(float32(this.X), float32(this.Y), float32(this.Z)))
// Model = Model.Mul4(mathgl.HomogRotate3DZ(float32(s.rot)))
// Model = Model.Mul4(mathgl.HomogRotate3D(s.Rot, mathgl.Vec3{s.XR, s.YR, s.ZR}))
// Euler rotation is easy.. no quaternions yet.. what a pain.
Model = Model.Mul4(mathgl.Rotate3DX(this.XR * this.Rot).Mat4())
Model = Model.Mul4(mathgl.Rotate3DY(this.YR * this.Rot).Mat4())
Model = Model.Mul4(mathgl.Rotate3DZ(this.ZR * this.Rot).Mat4())
Model = Model.Mul4(mathgl.Scale3D(float32(this.XS), float32(this.YS), float32(this.ZS)))
return Model
}
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 programLoop(window *glfw.Window) error {
// the linked shader program determines how the data will be rendered
vertShader, err := gfx.NewShaderFromFile("shaders/basic.vert", gl.VERTEX_SHADER)
if err != nil {
return err
}
fragShader, err := gfx.NewShaderFromFile("shaders/basic.frag", gl.FRAGMENT_SHADER)
if err != nil {
return err
}
program, err := gfx.NewProgram(vertShader, fragShader)
if err != nil {
return err
}
defer program.Delete()
vertices := []float32{
// position // texture position
-0.5, -0.5, -0.5, 0.0, 0.0,
0.5, -0.5, -0.5, 1.0, 0.0,
0.5, 0.5, -0.5, 1.0, 1.0,
0.5, 0.5, -0.5, 1.0, 1.0,
-0.5, 0.5, -0.5, 0.0, 1.0,
-0.5, -0.5, -0.5, 0.0, 0.0,
-0.5, -0.5, 0.5, 0.0, 0.0,
0.5, -0.5, 0.5, 1.0, 0.0,
0.5, 0.5, 0.5, 1.0, 1.0,
0.5, 0.5, 0.5, 1.0, 1.0,
-0.5, 0.5, 0.5, 0.0, 1.0,
-0.5, -0.5, 0.5, 0.0, 0.0,
-0.5, 0.5, 0.5, 1.0, 0.0,
-0.5, 0.5, -0.5, 1.0, 1.0,
-0.5, -0.5, -0.5, 0.0, 1.0,
-0.5, -0.5, -0.5, 0.0, 1.0,
-0.5, -0.5, 0.5, 0.0, 0.0,
-0.5, 0.5, 0.5, 1.0, 0.0,
0.5, 0.5, 0.5, 1.0, 0.0,
0.5, 0.5, -0.5, 1.0, 1.0,
0.5, -0.5, -0.5, 0.0, 1.0,
0.5, -0.5, -0.5, 0.0, 1.0,
0.5, -0.5, 0.5, 0.0, 0.0,
0.5, 0.5, 0.5, 1.0, 0.0,
-0.5, -0.5, -0.5, 0.0, 1.0,
0.5, -0.5, -0.5, 1.0, 1.0,
0.5, -0.5, 0.5, 1.0, 0.0,
0.5, -0.5, 0.5, 1.0, 0.0,
-0.5, -0.5, 0.5, 0.0, 0.0,
-0.5, -0.5, -0.5, 0.0, 1.0,
-0.5, 0.5, -0.5, 0.0, 1.0,
0.5, 0.5, -0.5, 1.0, 1.0,
0.5, 0.5, 0.5, 1.0, 0.0,
0.5, 0.5, 0.5, 1.0, 0.0,
-0.5, 0.5, 0.5, 0.0, 0.0,
-0.5, 0.5, -0.5, 0.0, 1.0,
}
indices := []uint32{}
VAO := createVAO(vertices, indices)
texture0, err := gfx.NewTextureFromFile("../images/RTS_Crate.png",
gl.CLAMP_TO_EDGE, gl.CLAMP_TO_EDGE)
if err != nil {
panic(err.Error())
}
texture1, err := gfx.NewTextureFromFile("../images/trollface-transparent.png",
gl.CLAMP_TO_EDGE, gl.CLAMP_TO_EDGE)
if err != nil {
panic(err.Error())
}
cubePositions := [][]float32{
[]float32{0.0, 0.0, -3.0},
[]float32{2.0, 5.0, -15.0},
[]float32{-1.5, -2.2, -2.5},
[]float32{-3.8, -2.0, -12.3},
[]float32{2.4, -0.4, -3.5},
[]float32{-1.7, 3.0, -7.5},
[]float32{1.3, -2.0, -2.5},
[]float32{1.5, 2.0, -2.5},
[]float32{1.5, 0.2, -1.5},
[]float32{-1.3, 1.0, -1.5},
}
gl.Enable(gl.DEPTH_TEST)
for !window.ShouldClose() {
// poll events and call their registered callbacks
glfw.PollEvents()
// background color
gl.ClearColor(0.2, 0.5, 0.5, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
// draw vertices
program.Use()
// set texture0 to uniform0 in the fragment shader
texture0.Bind(gl.TEXTURE0)
texture0.SetUniform(program.GetUniformLocation("ourTexture0"))
// set texture1 to uniform1 in the fragment shader
texture1.Bind(gl.TEXTURE1)
texture1.SetUniform(program.GetUniformLocation("ourTexture1"))
// update shader transform matrices
// Create transformation matrices
rotateX := (mgl32.Rotate3DX(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))
rotateY := (mgl32.Rotate3DY(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))
rotateZ := (mgl32.Rotate3DZ(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))
viewTransform := mgl32.Translate3D(0, 0, -3)
projectTransform := mgl32.Perspective(mgl32.DegToRad(60), windowWidth/windowHeight, 0.1, 100.0)
gl.UniformMatrix4fv(program.GetUniformLocation("view"), 1, false,
&viewTransform[0])
gl.UniformMatrix4fv(program.GetUniformLocation("project"), 1, false,
&projectTransform[0])
gl.UniformMatrix4fv(program.GetUniformLocation("worldRotateX"), 1, false,
&rotateX[0])
gl.UniformMatrix4fv(program.GetUniformLocation("worldRotateY"), 1, false,
&rotateY[0])
gl.UniformMatrix4fv(program.GetUniformLocation("worldRotateZ"), 1, false,
&rotateZ[0])
gl.BindVertexArray(VAO)
for _, pos := range cubePositions {
worldTranslate := mgl32.Translate3D(pos[0], pos[1], pos[2])
worldTransform := (worldTranslate.Mul4(rotateX.Mul3(rotateY).Mul3(rotateZ).Mat4()))
gl.UniformMatrix4fv(program.GetUniformLocation("world"), 1, false,
&worldTransform[0])
gl.DrawArrays(gl.TRIANGLES, 0, 36)
}
// gl.DrawElements(gl.TRIANGLES, 36, gl.UNSIGNED_INT, unsafe.Pointer(nil))
gl.BindVertexArray(0)
texture0.UnBind()
texture1.UnBind()
// end of draw loop
// swap in the rendered buffer
window.SwapBuffers()
}
return nil
}
func esPlayerModelTick(p *playerModelComponent,
pos PositionComponent, t *targetPositionComponent, r RotationComponent) {
x, y, z := pos.Position()
model := p.model
model.X, model.Y, model.Z = -float32(x), -float32(y), float32(z)
if p.heldModel != nil {
p.heldModel.X, p.heldModel.Y, p.heldModel.Z = -float32(x), -float32(y), float32(z)
p.heldModel.BlockLight, p.heldModel.SkyLight = p.model.BlockLight, p.model.SkyLight
}
offMat := mgl32.Translate3D(float32(x), -float32(y), float32(z)).
Mul4(mgl32.Rotate3DY(math.Pi - float32(r.Yaw())).Mat4())
if p.cape != "" {
if t.stillTime < 5.0 {
if p.capeTime < 30 {
p.capeTime += Client.delta
} else {
p.capeTime = 30
}
} else {
if p.capeTime > 0 {
p.capeTime -= Client.delta
} else {
p.capeTime = 0
}
}
p.model.Matrix[playerModelCape] = offMat.Mul4(mgl32.Translate3D(0, -24/16.0, 2/16.0)).
Mul4(mgl32.Rotate3DX(float32(p.capeTime)/60.0 + 0.05).Mat4())
}
// TODO This isn't the most optimal way of doing this
if p.hasNameTag {
val := math.Atan2(x-render.Camera.X, z-render.Camera.Z)
model.Matrix[playerModelNameTag] = mgl32.Translate3D(float32(x), -float32(y), float32(z)).
Mul4(mgl32.Translate3D(0, -12/16.0-12/16.0-0.6, 0)).
Mul4(mgl32.Rotate3DY(float32(val)).Mat4())
}
model.Matrix[playerModelHead] = offMat.Mul4(mgl32.Translate3D(0, -12/16.0-12/16.0, 0)).
Mul4(mgl32.Rotate3DX(float32(r.Pitch())).Mat4())
model.Matrix[playerModelBody] = offMat.Mul4(mgl32.Translate3D(0, -12/16.0-6/16.0, 0))
time := p.time
dir := p.dir
if dir == 0 {
dir = 1
time = 15
}
ang := ((time / 15) - 1) * (math.Pi / 4)
model.Matrix[playerModelLegRight] = offMat.Mul4(mgl32.Translate3D(2/16.0, -12/16.0, 0)).
Mul4(mgl32.Rotate3DX(float32(ang)).Mat4())
model.Matrix[playerModelLegLeft] = offMat.Mul4(mgl32.Translate3D(-2/16.0, -12/16.0, 0)).
Mul4(mgl32.Rotate3DX(-float32(ang)).Mat4())
iTime := p.idleTime
iTime += Client.delta * 0.02
if iTime > math.Pi*2 {
iTime -= math.Pi * 2
}
p.idleTime = iTime
if p.armTime <= 0 {
p.armTime = 0
} else {
p.armTime -= Client.delta
}
model.Matrix[playerModelArmRight] = offMat.Mul4(mgl32.Translate3D(6/16.0, -12/16.0-12/16.0, 0))
model.Matrix[playerModelArmRight] = model.Matrix[playerModelArmRight].
Mul4(mgl32.Rotate3DX(-float32(ang * 0.75)).Mat4()).
Mul4(mgl32.Rotate3DZ(float32(math.Cos(iTime)*0.06) - 0.06).Mat4()).
Mul4(mgl32.Rotate3DX(float32(math.Sin(iTime)*0.06) - float32((7.5-math.Abs(p.armTime-7.5))/7.5)).Mat4())
if p.heldModel != nil {
p.heldModel.Matrix[0] = offMat.Mul4(mgl32.Translate3D(6/16.0, -12/16.0-12/16.0, 0.0)).
Mul4(mgl32.Rotate3DX(-float32(ang * 0.75)).Mat4()).
Mul4(mgl32.Rotate3DZ(float32(math.Cos(iTime)*0.06) - 0.06).Mat4()).
Mul4(mgl32.Rotate3DX(float32(math.Sin(iTime)*0.06) - float32((7.5-math.Abs(p.armTime-7.5))/7.5)).Mat4()).
Mul4(mgl32.Translate3D(0, 11/16.0, -5/16.0)).
Mul4(mgl32.Rotate3DX(math.Pi).Mat4()).
Mul4(p.heldMat)
}
model.Matrix[playerModelArmLeft] = offMat.Mul4(mgl32.Translate3D(-6/16.0, -12/16.0-12/16.0, 0)).
Mul4(mgl32.Rotate3DX(float32(ang * 0.75)).Mat4()).
Mul4(mgl32.Rotate3DZ(-float32(math.Cos(iTime)*0.06) + 0.06).Mat4()).
Mul4(mgl32.Rotate3DX(-float32(math.Sin(iTime) * 0.06)).Mat4())
update := true
if (!p.manualMove && t.X == t.sX && t.Y == t.sY && t.Z == t.sZ) || (p.manualMove && !p.walking) {
if t.stillTime > 5.0 {
if math.Abs(time-15) <= 1.5*Client.delta {
time = 15
update = false
}
dir = math.Copysign(1, 15-time)
} else {
t.stillTime += Client.delta
}
} else {
t.stillTime = 0
}
if update {
time += Client.delta * 1.5 * dir
if time > 30 {
time = 30
dir = -1
} else if time < 0 {
time = 0
dir = 1
}
}
p.dir = dir
p.time = time
}
func modelToUI(mdl *model, block Block) *ui.Model {
mat := mgl32.Ident4()
if gui, ok := mdl.display["gui"]; ok {
if gui.Scale != nil {
mat = mat.Mul4(mgl32.Scale3D(
float32(gui.Scale[0]),
float32(gui.Scale[1]),
float32(gui.Scale[2]),
))
}
if gui.Translation != nil {
mat = mat.Mul4(mgl32.Translate3D(
float32(gui.Translation[0]/16),
float32(gui.Translation[1]/16),
float32(gui.Translation[2]/16),
))
}
if gui.Rotation != nil {
mat = mat.Mul4(mgl32.Rotate3DX(float32(gui.Rotation[0]/180) * math.Pi).Mat4())
mat = mat.Mul4(mgl32.Rotate3DZ(float32(gui.Rotation[2]/180) * math.Pi).Mat4())
mat = mat.Mul4(mgl32.Rotate3DY(float32(gui.Rotation[1]/180) * math.Pi).Mat4())
}
}
var verts []*ui.ModelVertex
p := precomputeModel(mdl)
for _, f := range p.faces {
var cr, cg, cb byte
cr = 255
cg = 255
cb = 255
if block != nil && block.TintImage() != nil {
switch f.tintIndex {
case 0:
bi := biome.Plains
ix := bi.ColorIndex & 0xFF
iy := bi.ColorIndex >> 8
col := block.TintImage().NRGBAAt(ix, iy)
cr = byte(col.R)
cg = byte(col.G)
cb = byte(col.B)
}
}
if f.facing == direction.East || f.facing == direction.West {
cr = byte(float64(cr) * 0.8)
cg = byte(float64(cg) * 0.8)
cb = byte(float64(cb) * 0.8)
}
if f.facing == direction.North || f.facing == direction.South {
cr = byte(float64(cr) * 0.6)
cg = byte(float64(cg) * 0.6)
cb = byte(float64(cb) * 0.6)
}
for _, vert := range f.vertices {
vert := &ui.ModelVertex{
X: vert.X,
Y: vert.Y,
Z: vert.Z,
TOffsetX: vert.TOffsetX,
TOffsetY: vert.TOffsetY,
R: cr,
G: cg,
B: cb,
A: 255,
TX: vert.TX,
TY: vert.TY,
TW: vert.TW,
TH: vert.TH,
TAtlas: vert.TAtlas,
}
verts = append(verts, vert)
}
}
return ui.NewModel(0, 0, verts, mat)
}
func staticModelFromItem(mdl *model, block Block, mode string) (out []*render.StaticVertex, mat mgl32.Mat4) {
mat = mgl32.Ident4()
if gui, ok := mdl.display[mode]; ok {
if gui.Scale != nil {
mat = mat.Mul4(mgl32.Scale3D(
float32(gui.Scale[0]),
float32(gui.Scale[1]),
float32(gui.Scale[2]),
))
}
if gui.Translation != nil {
mat = mat.Mul4(mgl32.Translate3D(
float32(gui.Translation[0]/32),
float32(gui.Translation[1]/32),
float32(gui.Translation[2]/32),
))
}
if gui.Rotation != nil {
mat = mat.Mul4(mgl32.Rotate3DX(float32(gui.Rotation[0]/180) * math.Pi).Mat4())
mat = mat.Mul4(mgl32.Rotate3DZ(float32(gui.Rotation[2]/180) * math.Pi).Mat4())
mat = mat.Mul4(mgl32.Rotate3DY(float32(gui.Rotation[1]/180) * math.Pi).Mat4())
}
}
mat = mat.Mul4(mgl32.Rotate3DZ(-math.Pi / 4).Mat4())
mat = mat.Mul4(mgl32.Rotate3DX(-math.Pi / 4).Mat4())
p := precomputeModel(mdl)
for fi := range p.faces {
f := p.faces[len(p.faces)-1-fi]
var cr, cg, cb byte
cr = 255
cg = 255
cb = 255
if block != nil && block.TintImage() != nil {
switch f.tintIndex {
case 0:
bi := biome.Plains
ix := bi.ColorIndex & 0xFF
iy := bi.ColorIndex >> 8
col := block.TintImage().NRGBAAt(ix, iy)
cr = byte(col.R)
cg = byte(col.G)
cb = byte(col.B)
}
}
if f.facing == direction.East || f.facing == direction.West {
cr = byte(float64(cr) * 0.8)
cg = byte(float64(cg) * 0.8)
cb = byte(float64(cb) * 0.8)
}
if f.facing == direction.North || f.facing == direction.South {
cr = byte(float64(cr) * 0.6)
cg = byte(float64(cg) * 0.6)
cb = byte(float64(cb) * 0.6)
}
for i, vert := range f.vertices {
vX, vY, vZ := vert.X, vert.Y, vert.Z
tex := f.verticesTexture[i]
rect := tex.Rect()
vert := &render.StaticVertex{
X: vX - 0.5,
Y: vY - 0.5,
Z: vZ - 0.5,
Texture: tex,
TextureX: float64(vert.TOffsetX) / float64(16*rect.Width),
TextureY: float64(vert.TOffsetY) / float64(16*rect.Height),
R: cr,
G: cg,
B: cb,
A: 255,
}
out = append(out, vert)
}
}
return
}
func genStaticModelFromItem(mdl *model, block Block, mode string) (out []*render.StaticVertex, mat mgl32.Mat4) {
mat = mgl32.Rotate3DZ(math.Pi).Mat4().
Mul4(mgl32.Rotate3DY(math.Pi / 2).Mat4()).
Mul4(mgl32.Rotate3DZ(-math.Pi / 2).Mat4())
if gui, ok := mdl.display[mode]; ok {
if gui.Scale != nil {
mat = mat.Mul4(mgl32.Scale3D(
float32(gui.Scale[0]),
float32(gui.Scale[1]),
float32(gui.Scale[2]),
))
}
if gui.Translation != nil {
mat = mat.Mul4(mgl32.Translate3D(
float32(gui.Translation[0]/32),
float32(gui.Translation[1]/32),
float32(gui.Translation[2]/32),
))
}
if gui.Rotation != nil {
mat = mat.Mul4(mgl32.Rotate3DX(math.Pi + float32(gui.Rotation[0]/180)*math.Pi).Mat4())
mat = mat.Mul4(mgl32.Rotate3DZ(math.Pi + float32(gui.Rotation[2]/180)*math.Pi).Mat4())
mat = mat.Mul4(mgl32.Rotate3DY(float32(gui.Rotation[1]/180) * math.Pi).Mat4())
}
}
mat = mat.Mul4(mgl32.Rotate3DY(math.Pi / 2).Mat4())
mat = mat.Mul4(mgl32.Translate3D(-1/16.0, 0, 0))
tex := render.GetTexture("solid")
rect := tex.Rect()
tName, plugin := mdl.textureVars["layer0"], "minecraft"
if pos := strings.IndexRune(tName, ':'); pos != -1 {
plugin = tName[:pos]
tName = tName[pos:]
}
f, err := resource.Open(plugin, "textures/"+tName+".png")
if err != nil {
return
}
defer f.Close()
img, err := png.Decode(f)
if err != nil {
panic(err)
}
w, h := img.Bounds().Dx(), img.Bounds().Dy()
sx := 1 / float32(w)
sy := 1 / float32(h)
isSolid := func(x, y int) bool {
col := img.At(x, y)
_, _, _, aa := col.RGBA()
if aa == 0 {
return false
}
return true
}
for x := 0; x < w; x++ {
for y := 0; y < h; y++ {
col := img.At(x, y)
rr, gg, bb, aa := col.RGBA()
if aa == 0 {
continue
}
for i, f := range faceVertices {
facing := direction.Type(i)
if facing != direction.North && facing != direction.South {
xx, yy, _ := facing.Offset()
if isSolid(x+xx, y+yy) {
continue
}
}
var cr, cg, cb byte
cr = byte(rr >> 8)
cg = byte(gg >> 8)
cb = byte(bb >> 8)
if facing == direction.East || facing == direction.West {
cr = byte(float64(cr) * 0.8)
cg = byte(float64(cg) * 0.8)
cb = byte(float64(cb) * 0.8)
}
if facing == direction.North || facing == direction.South {
cr = byte(float64(cr) * 0.6)
cg = byte(float64(cg) * 0.6)
cb = byte(float64(cb) * 0.6)
}
for _, vert := range f.verts {
vX, vY, vZ := float32(vert.X), float32(vert.Y), float32(vert.Z)
vert := &render.StaticVertex{
Y: vY*sy - 0.5 + sy*float32(y),
X: vX*sx - 0.5 + sx*float32(x),
Z: (vZ - 0.5) * (1.0 / 16.0),
Texture: tex,
TextureX: float64(vert.TOffsetX) / float64(16*rect.Width),
TextureY: float64(vert.TOffsetY) / float64(16*rect.Height),
R: cr,
G: cg,
B: cb,
A: byte(aa >> 8),
}
out = append(out, vert)
}
}
}
}
return
}
func programLoop(window *win.Window) error {
// the linked shader program determines how the data will be rendered
vertShader, err := gfx.NewShaderFromFile("shaders/basic.vert", gl.VERTEX_SHADER)
if err != nil {
return err
}
fragShader, err := gfx.NewShaderFromFile("shaders/basic.frag", gl.FRAGMENT_SHADER)
if err != nil {
return err
}
program, err := gfx.NewProgram(vertShader, fragShader)
if err != nil {
return err
}
defer program.Delete()
VAO := createVAO(cubeVertices, nil)
texture0, err := gfx.NewTextureFromFile("../images/RTS_Crate.png",
gl.CLAMP_TO_EDGE, gl.CLAMP_TO_EDGE)
if err != nil {
panic(err.Error())
}
texture1, err := gfx.NewTextureFromFile("../images/trollface-transparent.png",
gl.CLAMP_TO_EDGE, gl.CLAMP_TO_EDGE)
if err != nil {
panic(err.Error())
}
// 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(0.2, 0.5, 0.5, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT) // depth buffer needed for DEPTH_TEST
program.Use()
// bind textures
texture0.Bind(gl.TEXTURE0)
texture0.SetUniform(program.GetUniformLocation("ourTexture0"))
texture1.Bind(gl.TEXTURE1)
texture1.SetUniform(program.GetUniformLocation("ourTexture1"))
// cube rotation matrices
rotateX := (mgl32.Rotate3DX(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))
rotateY := (mgl32.Rotate3DY(mgl32.DegToRad(-60 * float32(glfw.GetTime()))))
rotateZ := (mgl32.Rotate3DZ(mgl32.DegToRad(-60 * 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()
gl.UniformMatrix4fv(program.GetUniformLocation("camera"), 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
for _, pos := range cubePositions {
worldTranslate := mgl32.Translate3D(pos[0], pos[1], pos[2])
worldTransform := (worldTranslate.Mul4(rotateX.Mul3(rotateY).Mul3(rotateZ).Mat4()))
gl.UniformMatrix4fv(program.GetUniformLocation("world"), 1, false,
&worldTransform[0])
gl.DrawArrays(gl.TRIANGLES, 0, 36)
}
gl.BindVertexArray(0)
texture0.UnBind()
texture1.UnBind()
// end of draw loop
}
return nil
}