引用于 UrbanEngine 在 2025年4月14日, 下午6:59

How to place a flat roof on top of poles- City Engine CGA rules

大家好

我正在 City Engine 中创建车棚 CGA 规则。这个车棚看起来像一张桌子，请帮忙制定这个 CGA 规则，我希望车顶能固定在杆子上，而不是像那样发生位移。

以下是我目前所做的：

Rule 1:

// Attributes

attr carportWidth = 5.0 // Width of the carport

attr carportDepth = 3.0 // Depth of the carport

attr carportHeight = 0.2 // Thickness of carport roof

attr poleHeight = 2.0 // Height of poles

attr poleWidth = 0.1 // Thickness of poles

attr carportColor = "#313333" // Color for roof and poles

 

// Start Rule

Footprint -->

s('1, 0, '1) // Normalize size (1x1 base)

PlaceCornerPoles // Place poles first

t(0, poleHeight, 0) // Move up to top of poles

Roof // Add roof directly at top of poles

 

// Roof definition

Roof -->

color(carportColor)

s(carportWidth, carportHeight, carportDepth)

center(y)

primitiveCube()

 

// Place poles at the four corners (aligned to roof corners)

PlaceCornerPoles -->

CornerPole(0, 0)

CornerPole(carportWidth, 0)

CornerPole(0, carportDepth)

CornerPole(carportWidth, carportDepth)

 

// Corner pole placement (centered on corner point)

CornerPole(xPos, zPos) -->

t(xPos - poleWidth/2, 0, zPos - poleWidth/2)

Pole

 

// Pole definition

Pole -->

color(carportColor)

s(poleWidth, poleHeight, poleWidth)

center(y)

primitiveCube()

Rule 2:

 

// Attributes

attr carportheight = 2.0 // Height of carport roof

attr poleheight = 2.0 // Height of support poles

attr polewidth = 0.1 // Thickness of poles

attr carportColor = "#313333" // Color for both roof and poles

 

// Start Rule

Footprint -->

s('1, 0, '1) // Normalize size (1x1 base)

extrude(carportheight)

comp(f) { top: Roof | side: NIL }

PlaceCornerPoles

 

// Roof definition

Roof -->

color(carportColor)

 

// Place poles at the four corners

PlaceCornerPoles -->

CornerPole(0, 0)

CornerPole(0, 1)

CornerPole(1, 0)

CornerPole(1, 1)

 

// Corner pole placement

CornerPole(xPos, zPos) -->

t(xPos, 0, zPos)

Pole

 

// Pole definition

Pole -->

s(polewidth, poleheight, polewidth)

center(y)

primitiveCube()

color(carportColor)