func tween(a, b mgl32.Vec2) (x, y float32) {
v := b.Sub(a)
v = v.Mul(0.5)
v = a.Add(v)
return v.Elem()
}
func (c *Container) mouseClick(button int, release bool, position mgl32.Vec2) {
offsetPos := position.Sub(c.offset)
c.Hitbox.MouseClick(button, release, offsetPos.Sub(c.backgroundOffset))
for _, child := range c.children {
child.mouseClick(button, release, offsetPos.Sub(c.elementsOffset))
}
}
func makeDot(v mgl32.Vec2, a float32, i int, clr mgl32.Vec4) mesh.Mesh {
m := mesh.Mesh{
Nmbr: mesh.Number(i),
Dpth: 0.5,
Vrts: []mgl32.Vec2{
{-dotx, 0}, // 0
{0, -doty}, // 1
{dotx, 0}, // 2
{0, doty}, // 3
},
Clrs: []mgl32.Vec4{
clr,
},
Trngls: []mesh.Triangle{
{
Vnd: mesh.Nd{0, 1, 2},
Flvr: mesh.CONVEX,
},
{
Vnd: mesh.Nd{2, 3, 0},
Flvr: mesh.CONVEX,
},
},
}
m.Transform(mgl32.HomogRotate2D(a)) // rotate by a
m.Transform(mgl32.Translate2D(v.Elem())) // translate by v
return m
}
/** Calculate line boundary points.
*
* Sketch:
*
* uh1___uh2
* .' '.
* .' q '.
* .' ' ' '.
*.' ' .'. ' '.
* ' .' ul'. '
* p .' '. r
*
*
* ul can be found as above, uh1 and uh2 are much simpler:
*
* uh1 = q + ns * w/2, uh2 = q + nt * w/2
*/
func (polyline *polyLine) renderBevelEdge(sleeve, current, next mgl32.Vec2) {
t := next.Sub(current)
len_t := t.Len()
det := determinant(sleeve, t)
if mgl32.Abs(det)/(sleeve.Len()*len_t) < LINES_PARALLEL_EPS && sleeve.Dot(t) > 0 {
// lines parallel, compute as u1 = q + ns * w/2, u2 = q - ns * w/2
n := getNormal(t, polyline.halfwidth/len_t)
polyline.normals = append(polyline.normals, n)
polyline.normals = append(polyline.normals, n.Mul(-1))
polyline.generateEdges(current, 2)
return // early out
}
// cramers rule
sleeve_normal := getNormal(sleeve, polyline.halfwidth/sleeve.Len())
nt := getNormal(t, polyline.halfwidth/len_t)
lambda := determinant(nt.Sub(sleeve_normal), t) / det
d := sleeve_normal.Add(sleeve.Mul(lambda))
if det > 0 { // 'left' turn -> intersection on the top
polyline.normals = append(polyline.normals, d)
polyline.normals = append(polyline.normals, sleeve_normal.Mul(-1))
polyline.normals = append(polyline.normals, d)
polyline.normals = append(polyline.normals, nt.Mul(-1))
} else {
polyline.normals = append(polyline.normals, sleeve_normal)
polyline.normals = append(polyline.normals, d.Mul(-1))
polyline.normals = append(polyline.normals, nt)
polyline.normals = append(polyline.normals, d.Mul(-1))
}
polyline.generateEdges(current, 4)
}
func (ai *AI) moveAlongPath(targetPosition mgl32.Vec2, path []graph.Node) {
minDistance2 := square(float32(ai.Me.Size) + costMapReduction*1.3)
var pathNode *mapNode
var pathVecs []mgl32.Vec2
for _, rawNode := range path {
node := rawNode.(*mapNode)
pos := mgl32.Vec2{float32(node.X) * costMapReduction, float32(node.Y) * costMapReduction}
if pathNode == nil && dist2(ai.Me.Position, pos) >= minDistance2 {
pathNode = node
}
pathVecs = append(pathVecs, pos)
}
if pathNode == nil {
ai.addStatusMessage("Failed to find path node that was far enough away. Moving directly to objective.")
ai.Path = []mgl32.Vec2{ai.Me.Position, targetPosition}
ai.g.SetTargetPos(targetPosition.X(), targetPosition.Y())
return
}
ai.Path = pathVecs
ai.g.SetTargetPos(float32(pathNode.X*costMapReduction), float32(pathNode.Y*costMapReduction))
}
func (c *Container) mouseMove(position mgl32.Vec2) {
offsetPos := position.Sub(c.offset)
c.Hitbox.MouseMove(offsetPos.Sub(c.backgroundOffset))
for _, child := range c.children {
child.mouseMove(offsetPos.Sub(c.elementsOffset))
}
}
func (polyline *polyLine) render(coords []float32) {
var sleeve, current, next mgl32.Vec2
polyline.vertices = []mgl32.Vec2{}
polyline.normals = []mgl32.Vec2{}
coords_count := len(coords)
is_looping := (coords[0] == coords[coords_count-2]) && (coords[1] == coords[coords_count-1])
if !is_looping { // virtual starting point at second point mirrored on first point
sleeve = mgl32.Vec2{coords[2] - coords[0], coords[3] - coords[1]}
} else { // virtual starting point at last vertex
sleeve = mgl32.Vec2{coords[0] - coords[coords_count-4], coords[1] - coords[coords_count-3]}
}
for i := 0; i+3 < coords_count; i += 2 {
current = mgl32.Vec2{coords[i], coords[i+1]}
next = mgl32.Vec2{coords[i+2], coords[i+3]}
polyline.renderEdge(sleeve, current, next)
sleeve = next.Sub(current)
}
if is_looping {
polyline.renderEdge(sleeve, next, mgl32.Vec2{coords[2], coords[3]})
} else {
polyline.renderEdge(sleeve, next, next.Add(sleeve))
}
if polyline.join == LINE_JOIN_NONE {
polyline.vertices = polyline.vertices[2 : len(polyline.vertices)-2]
}
polyline.draw(is_looping)
}
func (c *Camera) project(pt mgl32.Vec2) mgl32.Vec2 {
var (
screen = pt.Vec4(1, 1)
out mgl32.Vec4
)
out = c.Projection.Mul4x1(screen)
return out.Vec2()
}
func (c *Camera) unproject(pt mgl32.Vec2) mgl32.Vec2 {
var (
screen = pt.Vec4(1, 1)
out mgl32.Vec4
)
out = c.Inverse.Mul4x1(screen)
out = out.Mul(1.0 / out[3])
return out.Vec2()
}
func normalize(v1 mgl32.Vec2, length float32) mgl32.Vec2 {
length_current := v1.Len()
if length_current > 0 {
v1 = v1.Mul(length / length_current)
}
return v1
}
func (te *TextElement) updateImage(size mgl32.Vec2) {
// Initialize the context.
bg := image.Transparent
c := te.getContext()
text := te.GetHiddenText()
if len(text) == 0 {
text = te.props.placeholder
r, g, b, _ := te.props.textColor.RGBA()
placeholderColor := color.RGBA{uint8(r), uint8(g), uint8(b), 80}
c.SetSrc(image.NewUniform(placeholderColor))
}
// Establish image dimensions and do word wrap
textHeight := c.PointToFixed(float64(te.props.textSize))
var width int
var height int = int(textHeight >> 6)
words := strings.Split(text, " ")
lines := []string{""}
lineNb := 0
for _, word := range words {
wordWithSpace := fmt.Sprintf("%v ", word)
dimensions, _ := c.StringDimensions(wordWithSpace)
width += int(dimensions.X >> 6)
if width > int(size.X()) {
width = int(dimensions.X >> 6)
height += int(dimensions.Y>>6) + 1
lines = append(lines, "")
lineNb += 1
}
lines[lineNb] = fmt.Sprintf("%v%v", lines[lineNb], wordWithSpace)
}
if te.props.height > 0 {
height = int(te.props.height)
}
rgba := image.NewRGBA(image.Rect(0, 0, int(size.X()), height+int(textHeight>>6)/3))
draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
c.SetClip(rgba.Bounds())
c.SetDst(rgba)
// Draw the text.
pt := freetype.Pt(0, int(textHeight>>6))
for _, line := range lines {
_, err := c.DrawString(line, pt)
if err != nil {
log.Printf("Error drawing string: %v\n", err)
return
}
pt.Y += textHeight
}
te.img.SetImage(imaging.FlipV(rgba))
te.img.SetWidth(float32(rgba.Bounds().Size().X))
te.img.SetHeight(float32(rgba.Bounds().Size().Y))
}
func (c *Camera) ScreenToWorldCoords(screenCoords mgl32.Vec2) mgl32.Vec2 {
// http://stackoverflow.com/questions/7692988/
var (
half = c.ScreenSize.Mul(0.5)
pt = mgl32.Vec2{
(screenCoords.X() - half.X()) / half.X(),
(half.Y() - screenCoords.Y()) / half.Y(),
}
)
return c.unproject(pt)
}
func (r *SplashRenderer) splashConfig(sheet *twodee.Spritesheet, pt mgl32.Vec2, name string) twodee.SpriteConfig {
frame := sheet.GetFrame(name)
return twodee.SpriteConfig{
View: twodee.ModelViewConfig{
pt.X() + frame.Width/2.0, pt.Y() + frame.Height/2.0, 0.0, // Center
0, 0, 0,
1.0, 1.0, 1.0,
},
Frame: frame.Frame,
}
}
func (h *HudLayer) highlightSpriteConfig(sheet *twodee.Spritesheet, pt mgl32.Vec2, name string) twodee.SpriteConfig {
frame := sheet.GetFrame(name)
return twodee.SpriteConfig{
View: twodee.ModelViewConfig{
pt.X() + frame.Width/2.0, pt.Y() + frame.Height/6.0, 0.0, // Left aligned
0, 0, 0,
1.0, 1.0, 1.0,
},
Frame: frame.Frame,
}
}
func computeMiter(lineA, lineB mgl32.Vec2, halfThick float32) (miter mgl32.Vec2, length float32) {
var (
tangent mgl32.Vec2
tmp mgl32.Vec2
)
tangent = lineA.Add(lineB).Normalize()
miter = mgl32.Vec2{-tangent[1], tangent[0]}
tmp = mgl32.Vec2{-lineA[1], lineA[0]}
length = halfThick / miter.Dot(tmp)
return
}
func (h *HudLayer) cursorSpriteConfig(sheet *twodee.Spritesheet, pt mgl32.Vec2, cursor string) twodee.SpriteConfig {
frame := sheet.GetFrame(cursor)
return twodee.SpriteConfig{
View: twodee.ModelViewConfig{
pt.X(), pt.Y(), 0.0,
0, 0, 0,
1.0, 1.0, 1.0,
},
Frame: frame.Frame,
}
}
func (s *Sprite) textureBounds(textureBounds mgl32.Vec2) render.UniformSprite {
return render.NewUniformSprite(
s.bounds.X()/textureBounds.X(),
s.bounds.Y()/textureBounds.Y(),
s.offset.X()/textureBounds.X(),
1.0-(s.offset.Y()+s.bounds.Y()-1.0)/textureBounds.Y(),
)
}
func (te *TextElement) Render(size, offset mgl32.Vec2) mgl32.Vec2 {
te.props.size, te.props.offset = size, offset
textWidth, textHeight := size.X(), size.Y()
if te.props.width > 0 {
textWidth = te.props.width
}
if te.props.height > 0 {
textHeight = te.props.height
}
if te.previousProps != te.props {
te.updateImage(mgl32.Vec2{textWidth, textHeight})
te.previousProps = te.props
}
return te.img.Render(size, offset)
}
// TwoSegmentIntersect - find the intersection point of two line segments <p11-p12> and <p21-p22>
func TwoSegmentIntersect(p11, p12, p21, p22 mgl32.Vec2) (mgl32.Vec2, error) {
p := p11
q := p21
r := p12.Sub(p11)
s := p22.Sub(p21)
if math.Abs(float64(Vec2Cross(r, s))) < 0.0000001 {
return mgl32.Vec2{}, fmt.Errorf("No intersections: lines parallel")
}
t := Vec2Cross(q.Sub(p), s) / Vec2Cross(r, s)
u := Vec2Cross(p.Sub(q), r) / Vec2Cross(s, r)
if t >= 0 && t <= 1 && u >= 0 && u <= 1 {
return p.Add(r.Mul(t)), nil
}
return mgl32.Vec2{}, fmt.Errorf("No intersections")
}
func (c *Container) Render(size, offset mgl32.Vec2) mgl32.Vec2 {
c.size, c.offset = size, offset
padding := convertMargin(c.padding, c.paddingPercent, size.X())
margin := convertMargin(c.margin, c.marginPercent, size.X())
sizeMinusMargins := size.Sub(mgl32.Vec2{
margin.Left + margin.Right + padding.Left + padding.Right,
margin.Top + margin.Bottom + padding.Top + padding.Bottom,
})
containerSize := sizeMinusMargins
if c.width > 0 {
containerSize[0] = c.getWidth(size.X()) - padding.Left - padding.Right
}
if c.height > 0 {
containerSize[1] = c.getHeight(size.X()) - padding.Top - padding.Bottom
}
var width, height, highest float32 = 0, 0, 0
for _, child := range c.children {
childSize := child.Render(containerSize, mgl32.Vec2{width, height})
width += childSize.X()
if width > containerSize.X() {
height += highest
highest = 0
childSize = child.Render(containerSize, mgl32.Vec2{0, height})
width = childSize.X()
}
if childSize.Y() > highest {
highest = childSize.Y()
}
}
height += highest
if mgl32.FloatEqual(c.height, 0) {
containerSize[1] = height
}
//offsets and sizes
c.backgroundOffset = mgl32.Vec2{margin.Left, margin.Top}
c.elementsOffset = mgl32.Vec2{margin.Left + padding.Left, margin.Top + padding.Top}
backgroundSize := containerSize.Add(mgl32.Vec2{padding.Left + padding.Right, padding.Top + padding.Bottom})
totalSize := backgroundSize.Add(mgl32.Vec2{margin.Left + margin.Right, margin.Top + margin.Bottom})
c.background.SetScale(backgroundSize.Vec3(0))
c.background.SetTranslation(c.backgroundOffset.Vec3(0))
c.elementsNode.SetTranslation(c.elementsOffset.Vec3(0))
c.node.SetTranslation(c.offset.Vec3(0))
c.Hitbox.SetSize(backgroundSize)
return totalSize
}
func ClickAndDragWindow(window *Window, hitbox Hitbox, c controller.Controller) {
grabbed := false
grabOffset := mgl32.Vec2{}
hitbox.AddOnClick(func(button int, release bool, position mgl32.Vec2) {
grabOffset = position
grabbed = !release
})
c.BindMouseAction(func() {
grabbed = false
}, controller.MouseButton1, controller.Release)
c.BindAxisAction(func(xpos, ypos float32) {
if grabbed {
position := mgl32.Vec2{xpos, ypos}
window.SetTranslation(position.Sub(grabOffset).Vec3(0))
}
})
}
func (ai *AI) getPseudoMe() *agario.Cell {
firstCell := ai.OwnCells[0]
me := &agario.Cell{
ID: firstCell.ID,
Name: firstCell.Name,
Heading: firstCell.Heading,
Color: firstCell.Color,
IsVirus: firstCell.IsVirus,
}
var avgPosition mgl32.Vec2
for _, cell := range ai.OwnCells {
me.Size += cell.Size
if avgPosition.X() == 0 && avgPosition.Y() == 0 {
avgPosition = cell.Position
continue
}
avgPosition = avgPosition.Add(cell.Position)
}
n := float32(len(ai.OwnCells))
avgPosition[0] = avgPosition[0] / n
avgPosition[1] = avgPosition[1] / n
me.Position = avgPosition
return me
}
/** Calculate line boundary points.
*
* Sketch:
*
* u1
* -------------+---...___
* | ```'''-- ---
* p- - - - - - q- - . _ _ | w/2
* | ` ' ' r +
* -------------+---...___ | w/2
* u2 ```'''-- ---
*
* u1 and u2 depend on four things:
* - the half line width w/2
* - the previous line vertex p
* - the current line vertex q
* - the next line vertex r
*
* u1/u2 are the intersection points of the parallel lines to p-q and q-r,
* i.e. the point where
*
* (q + w/2 * ns) + lambda * (q - p) = (q + w/2 * nt) + mu * (r - q) (u1)
* (q - w/2 * ns) + lambda * (q - p) = (q - w/2 * nt) + mu * (r - q) (u2)
*
* with nt,nt being the normals on the segments s = p-q and t = q-r,
*
* ns = perp(s) / |s|
* nt = perp(t) / |t|.
*
* Using the linear equation system (similar for u2)
*
* q + w/2 * ns + lambda * s - (q + w/2 * nt + mu * t) = 0 (u1)
* <=> q-q + lambda * s - mu * t = (nt - ns) * w/2
* <=> lambda * s - mu * t = (nt - ns) * w/2
*
* the intersection points can be efficiently calculated using Cramer's rule.
*/
func (polyline *polyLine) renderMiterEdge(sleeve, current, next mgl32.Vec2) {
sleeve_normal := getNormal(sleeve, polyline.halfwidth/sleeve.Len())
t := next.Sub(current)
len_t := t.Len()
det := determinant(sleeve, t)
// lines parallel, compute as u1 = q + ns * w/2, u2 = q - ns * w/2
if mgl32.Abs(det)/(sleeve.Len()*len_t) < LINES_PARALLEL_EPS && sleeve.Dot(t) > 0 {
polyline.normals = append(polyline.normals, sleeve_normal)
polyline.normals = append(polyline.normals, sleeve_normal.Mul(-1))
} else {
// cramers rule
nt := getNormal(t, polyline.halfwidth/len_t)
lambda := determinant(nt.Sub(sleeve_normal), t) / det
d := sleeve_normal.Add(sleeve.Mul(lambda))
polyline.normals = append(polyline.normals, d)
polyline.normals = append(polyline.normals, d.Mul(-1))
}
polyline.generateEdges(current, 2)
}
func createTextVertices(text string, position mgl32.Vec2, size float32, font *Font) (vertices []mgl32.Vec2, uvs []mgl32.Vec2) {
x := position.X()
y := float32(currentWindow.Height()) - position.Y()
for c, char := range text {
i := float32(c)
upLeft := mgl32.Vec2{x + i*size, y + size}
upRight := mgl32.Vec2{x + i*size + size, y + size}
downRight := mgl32.Vec2{x + i*size + size, y}
downLeft := mgl32.Vec2{x + i*size, y}
vertices = append(vertices, upLeft, downLeft, upRight)
vertices = append(vertices, downRight, upRight, downLeft)
glyph := font.font.Glyphs().Find(string(char))
fullWidth := float32(font.font.Width)
fullHeight := float32(font.font.Height)
width := float32(glyph.Width)
height := float32(glyph.Height)
x := float32(glyph.X)
y := float32(glyph.Y)
uvX := x / fullWidth
uvY := (fullHeight - y) / fullHeight
uvWidth := width / fullWidth
uvHeight := height / fullHeight
uvUpLeft := mgl32.Vec2{uvX, uvY}
uvUpRight := mgl32.Vec2{uvX + uvWidth, uvY}
uvDownRight := mgl32.Vec2{uvX + uvWidth, uvY - uvHeight}
uvDownLeft := mgl32.Vec2{uvX, uvY - uvHeight}
uvs = append(uvs, uvUpLeft, uvDownLeft, uvUpRight)
uvs = append(uvs, uvDownRight, uvUpRight, uvDownLeft)
}
return
}
func moveC(v mgl32.Vec2) {
d := v.Sub(lstPnt) // calculate delta vec
lstPnt = v
switch slctdC {
case 0:
c0dy += d[1]
case 1:
c1dy += d[1]
case 2:
c2dy += d[1]
case 4:
c4dx += d[0]
case 5:
c5dx += d[0]
c5dy += d[1]
}
}
func (m *Mob) moveTowardExit(elapsed time.Duration, level *Level) {
var (
dest mgl32.Vec2
ok bool
pct = float32(elapsed) / float32(time.Second)
gridDist mgl32.Vec2
goalDist int32
stepDist = pct * m.Speed
)
if dest, goalDist, ok = level.Grid.GetNextStepToSink(m.Pos); !ok {
return
}
gridDist = dest.Sub(m.Pos)
if goalDist == 1 && gridDist.Len() < stepDist+0.5 {
m.PendingDisable = true
}
if gridDist.X() > 0 {
m.swapState(Left, Right)
} else {
m.swapState(Right, Left)
}
m.Pos = m.Pos.Add(gridDist.Normalize().Mul(stepDist))
}
func (ai *AI) movePathed(position mgl32.Vec2) {
minDistance2 := square(float32(ai.Me.Size) + costMapReduction*1.3)
if dist2(ai.Me.Position, position) < minDistance2 {
ai.addStatusMessage("Objective is within minimum distance. Moving directly to objective.")
ai.Path = []mgl32.Vec2{ai.Me.Position, position}
ai.g.SetTargetPos(position.X(), position.Y())
return
}
// meNode := ai.Map.GetNode(gameToCostMap(ai.Me.Position.Elem()))
// positionNode := ai.Map.GetNode(gameToCostMap(position.Elem()))
// path, cost, nodes := search.AStar(meNode, positionNode, ai.Map, nil, nil)
// if path == nil {
// ai.addStatusMessage("Failed to find path. Trying undirected.")
// ai.movePathedUndirected(position)
// return
// }
// ai.addStatusMessage(fmt.Sprintf("A*: path cost: %.2f / nodes expanded: %d", cost, nodes))
positionNode := ai.Map.GetNode(gameToCostMap(position.Elem()))
path, cost := ai.DijkstraMap.To(positionNode)
if path == nil {
ai.addStatusMessage("movePathed: Failed to find path. Moving directly to objective.")
ai.Path = []mgl32.Vec2{ai.Me.Position, position}
ai.g.SetTargetPos(position.X(), position.Y())
return
}
ai.addStatusMessage(fmt.Sprintf("movePathed: path cost: %.2f", cost))
ai.moveAlongPath(position, path)
}
func (ie *ImageElement) Render(size, offset mgl32.Vec2) mgl32.Vec2 {
ie.size, ie.offset = size, offset
width, height := ie.getWidth(size.X()), ie.getHeight(size.X())
if ie.img != nil {
if width <= 0 && height <= 0 {
width = float32(ie.img.Bounds().Size().X)
height = float32(ie.img.Bounds().Size().Y)
} else if width <= 0 {
width = height * float32(ie.img.Bounds().Size().X) / float32(ie.img.Bounds().Size().Y)
} else if height <= 0 {
height = width * float32(ie.img.Bounds().Size().Y) / float32(ie.img.Bounds().Size().X)
}
}
imgSize := mgl32.Vec2{width, height}
ie.node.SetScale(imgSize.Vec3(0))
ie.node.SetTranslation(offset.Vec3(0))
ie.offset = offset
ie.Hitbox.SetSize(imgSize)
return imgSize
}
func (polyline *polyLine) renderNoEdge(sleeve, current, next mgl32.Vec2) {
sleeve_normal := getNormal(sleeve, polyline.halfwidth/sleeve.Len())
polyline.normals = append(polyline.normals, sleeve_normal)
polyline.normals = append(polyline.normals, sleeve_normal.Mul(-1))
sleeve = next.Sub(current)
sleeve_normal = getNormal(sleeve, polyline.halfwidth/sleeve.Len())
polyline.normals = append(polyline.normals, sleeve_normal.Mul(-1))
polyline.normals = append(polyline.normals, sleeve_normal)
polyline.generateEdges(current, 4)
}
func makeTriangle(n mesh.Number, d float32, o mgl32.Vec2) mesh.Mesh {
return mesh.Mesh{
Nmbr: n,
Dpth: d,
Vrts: []mgl32.Vec2{
o.Add(mgl32.Vec2{0, 0}),
o.Add(mgl32.Vec2{0, 100}),
o.Add(mgl32.Vec2{100, 100}),
},
Clrs: []mgl32.Vec4{
{0.7, 1.0, 0.0, 0.7},
},
Trngls: []mesh.Triangle{
{Vnd: mesh.Nd{0, 1, 2}},
},
}
}