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Terrain grid goes between -1 and 1

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Eryn Wells 2018-11-03 15:07:21 -04:00
parent 49783610e7
commit dff9e5d3bf
1 changed files with 19 additions and 6 deletions
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25
Terrain/Terrain.swift
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@ -45,15 +45,28 @@ class Terrain: NSObject {
let (cellWidth, cellHeight) = (Float(2.0) / Float(size.width), Float(2.0) / Float(size.height))
for y in 0..<Int(size.height) {
for x in 0..<Int(size.width) {
vertexes.append(Float3(x: Float(x) * cellWidth, y: Float(y) * cellHeight, z: 0.0))
vertexes.append(Float3(x: Float(x) * cellWidth, y: Float(y) * cellHeight + cellHeight, z: 0.0))
vertexes.append(Float3(x: Float(x) * cellWidth + cellWidth, y: Float(y) * cellHeight, z: 0.0))
vertexes.append(Float3(x: Float(x) * cellWidth + cellWidth, y: Float(y) * cellHeight, z: 0.0))
vertexes.append(Float3(x: Float(x) * cellWidth, y: Float(y) * cellHeight + cellHeight, z: 0.0))
vertexes.append(Float3(x: Float(x) * cellWidth + cellWidth, y: Float(y) * cellHeight + cellHeight, z: 0.0))
vertexes.append(Float3(x: -1 + Float(x) * cellWidth,
y: -1 + Float(y) * cellHeight,
z: 0.0))
vertexes.append(Float3(x: -1 + Float(x) * cellWidth,
y: -1 + Float(y) * cellHeight + cellHeight,
z: 0.0))
vertexes.append(Float3(x: -1 + Float(x) * cellWidth + cellWidth,
y: -1 + Float(y) * cellHeight,
z: 0.0))
vertexes.append(Float3(x: -1 + Float(x) * cellWidth + cellWidth,
y: -1 + Float(y) * cellHeight,
z: 0.0))
vertexes.append(Float3(x: -1 + Float(x) * cellWidth,
y: -1 + Float(y) * cellHeight + cellHeight,
z: 0.0))
vertexes.append(Float3(x: -1 + Float(x) * cellWidth + cellWidth,
y: -1 + Float(y) * cellHeight + cellHeight,
z: 0.0))
}
}
buffer.label = "Terrain Vertex Data"
self.buffer = buffer
memcpy(buffer.contents(), vertexes, expectedLength)
}