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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| // | ||
| // Billboard.swift | ||
| // Engine | ||
| // | ||
| // Created by Nick Lockwood on 05/06/2019. | ||
| // Copyright © 2019 Nick Lockwood. All rights reserved. | ||
| // | ||
|
|
||
| public struct Billboard { | ||
| public var start: Vector | ||
| public var direction: Vector | ||
| public var length: Double | ||
|
|
||
| public init(start: Vector, direction: Vector, length: Double) { | ||
| self.start = start | ||
| self.direction = direction | ||
| self.length = length | ||
| } | ||
| } | ||
|
|
||
| public extension Billboard { | ||
| var end: Vector { | ||
| return start + direction * length | ||
| } | ||
|
|
||
| func hitTest(_ ray: Ray) -> Vector? { | ||
| var lhs = ray, rhs = Ray(origin: start, direction: direction) | ||
|
|
||
| // Ensure rays are never exactly vertical | ||
| let epsilon = 0.00001 | ||
| if abs(lhs.direction.x) < epsilon { | ||
| lhs.direction.x = epsilon | ||
| } | ||
| if abs(rhs.direction.x) < epsilon { | ||
| rhs.direction.x = epsilon | ||
| } | ||
|
|
||
| // Calculate slopes and intercepts | ||
| let (slope1, intercept1) = lhs.slopeIntercept | ||
| let (slope2, intercept2) = rhs.slopeIntercept | ||
|
|
||
| // Check if slopes are parallel | ||
| if slope1 == slope2 { | ||
| return nil | ||
| } | ||
|
|
||
| // Find intersection point | ||
| let x = (intercept1 - intercept2) / (slope2 - slope1) | ||
| let y = slope1 * x + intercept1 | ||
|
|
||
| // Check intersection point is in range | ||
| let distanceAlongRay = (x - lhs.origin.x) / lhs.direction.x | ||
| if distanceAlongRay < 0 { | ||
| return nil | ||
| } | ||
| let distanceAlongBillboard = (x - rhs.origin.x) / rhs.direction.x | ||
| if distanceAlongBillboard < 0 || distanceAlongBillboard > length { | ||
| return nil | ||
| } | ||
|
|
||
| return Vector(x: x, y: y) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| // | ||
| // Monster.swift | ||
| // Engine | ||
| // | ||
| // Created by Nick Lockwood on 02/06/2019. | ||
| // Copyright © 2019 Nick Lockwood. All rights reserved. | ||
| // | ||
|
|
||
| public struct Monster { | ||
| public var position: Vector | ||
|
|
||
| public init(position: Vector) { | ||
| self.position = position | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -9,4 +9,5 @@ | |
| public enum Thing: Int, Decodable { | ||
| case nothing | ||
| case player | ||
| case monster | ||
| } | ||
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80 changes: 80 additions & 0 deletions
80
Source/Rampage.xcodeproj/xcshareddata/xcschemes/Engine.xcscheme
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| <?xml version="1.0" encoding="UTF-8"?> | ||
| <Scheme | ||
| LastUpgradeVersion = "1010" | ||
| version = "1.3"> | ||
| <BuildAction | ||
| parallelizeBuildables = "YES" | ||
| buildImplicitDependencies = "YES"> | ||
| <BuildActionEntries> | ||
| <BuildActionEntry | ||
| buildForTesting = "YES" | ||
| buildForRunning = "YES" | ||
| buildForProfiling = "YES" | ||
| buildForArchiving = "YES" | ||
| buildForAnalyzing = "YES"> | ||
| <BuildableReference | ||
| BuildableIdentifier = "primary" | ||
| BlueprintIdentifier = "016E41C8228E9A8600ACF137" | ||
| BuildableName = "Engine.framework" | ||
| BlueprintName = "Engine" | ||
| ReferencedContainer = "container:Rampage.xcodeproj"> | ||
| </BuildableReference> | ||
| </BuildActionEntry> | ||
| </BuildActionEntries> | ||
| </BuildAction> | ||
| <TestAction | ||
| buildConfiguration = "Debug" | ||
| selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB" | ||
| selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB" | ||
| shouldUseLaunchSchemeArgsEnv = "YES"> | ||
| <Testables> | ||
| </Testables> | ||
| <AdditionalOptions> | ||
| </AdditionalOptions> | ||
| </TestAction> | ||
| <LaunchAction | ||
| buildConfiguration = "Debug" | ||
| selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB" | ||
| selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB" | ||
| launchStyle = "0" | ||
| useCustomWorkingDirectory = "NO" | ||
| ignoresPersistentStateOnLaunch = "NO" | ||
| debugDocumentVersioning = "YES" | ||
| debugServiceExtension = "internal" | ||
| allowLocationSimulation = "YES"> | ||
| <MacroExpansion> | ||
| <BuildableReference | ||
| BuildableIdentifier = "primary" | ||
| BlueprintIdentifier = "016E41C8228E9A8600ACF137" | ||
| BuildableName = "Engine.framework" | ||
| BlueprintName = "Engine" | ||
| ReferencedContainer = "container:Rampage.xcodeproj"> | ||
| </BuildableReference> | ||
| </MacroExpansion> | ||
| <AdditionalOptions> | ||
| </AdditionalOptions> | ||
| </LaunchAction> | ||
| <ProfileAction | ||
| buildConfiguration = "Release" | ||
| shouldUseLaunchSchemeArgsEnv = "YES" | ||
| savedToolIdentifier = "" | ||
| useCustomWorkingDirectory = "NO" | ||
| debugDocumentVersioning = "YES"> | ||
| <MacroExpansion> | ||
| <BuildableReference | ||
| BuildableIdentifier = "primary" | ||
| BlueprintIdentifier = "016E41C8228E9A8600ACF137" | ||
| BuildableName = "Engine.framework" | ||
| BlueprintName = "Engine" | ||
| ReferencedContainer = "container:Rampage.xcodeproj"> | ||
| </BuildableReference> | ||
| </MacroExpansion> | ||
| </ProfileAction> | ||
| <AnalyzeAction | ||
| buildConfiguration = "Debug"> | ||
| </AnalyzeAction> | ||
| <ArchiveAction | ||
| buildConfiguration = "Release" | ||
| revealArchiveInOrganizer = "YES"> | ||
| </ArchiveAction> | ||
| </Scheme> |
21 changes: 21 additions & 0 deletions
21
Source/Rampage/Assets.xcassets/monster.imageset/Contents.json
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| { | ||
| "images" : [ | ||
| { | ||
| "idiom" : "universal", | ||
| "filename" : "monster.png", | ||
| "scale" : "1x" | ||
| }, | ||
| { | ||
| "idiom" : "universal", | ||
| "scale" : "2x" | ||
| }, | ||
| { | ||
| "idiom" : "universal", | ||
| "scale" : "3x" | ||
| } | ||
| ], | ||
| "info" : { | ||
| "version" : 1, | ||
| "author" : "xcode" | ||
| } | ||
| } |
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