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annotate src/semicongine/engine.nim @ 769:bb4c36d68444

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add: some API improvments for vector, entity, and some other stuff
author Sam <sam@basx.dev>
date Sat, 08 Jul 2023 18:52:34 +0700
parents 0b5566fc214d
children 4921ec86dcb4
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diff changeset
1 import std/sequtils
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2 import std/options
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3 import std/logging
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4 import std/os
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5
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6 import ./platform/window
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7
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8 import ./core
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9 import ./vulkan/instance
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10 import ./vulkan/device
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11 import ./vulkan/physicaldevice
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12 import ./vulkan/renderpass
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13
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14 import ./scene
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15 import ./renderer
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16 import ./events
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17 import ./audio
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18
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19 type
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20 EngineState* = enum
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21 Starting
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22 Running
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23 Shutdown
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24 Input = object
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25 keyIsDown: set[Key]
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26 keyWasPressed: set[Key]
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27 keyWasReleased: set[Key]
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28 mouseIsDown: set[MouseButton]
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29 mouseWasPressed: set[MouseButton]
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30 mouseWasReleased: set[MouseButton]
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31 mousePosition: Vec2f
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32 mouseMove: Vec2f
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33 eventsProcessed: uint64
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34 windowWasResized: bool
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35 mouseWheel: float32
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36 Engine* = object
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37 state*: EngineState
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38 device: Device
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39 debugger: Debugger
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40 instance: Instance
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41 window: NativeWindow
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42 renderer: Option[Renderer]
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43 input: Input
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44 exitHandler: proc(engine: var Engine)
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45 resizeHandler: proc(engine: var Engine)
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46 eventHandler: proc(engine: var Engine, event: Event)
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47
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48
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49 proc destroy*(engine: var Engine) =
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50 checkVkResult engine.device.vk.vkDeviceWaitIdle()
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51 if engine.renderer.isSome:
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52 engine.renderer.get.destroy()
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53 engine.device.destroy()
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54 if engine.debugger.messenger.valid:
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55 engine.debugger.destroy()
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56 engine.window.destroy()
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57 engine.instance.destroy()
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58
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59
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60 proc initEngine*(
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61 applicationName: string,
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62 debug=DEBUG,
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63 exitHandler: proc(engine: var Engine) = nil,
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64 resizeHandler: proc(engine: var Engine) = nil,
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65 eventHandler: proc(engine: var Engine, event: Event) = nil
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66 ): Engine =
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67 echo "Set log level to ", ENGINE_LOGLEVEL
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68 setLogFilter(ENGINE_LOGLEVEL)
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69
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70 result.state = Starting
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71 result.exitHandler = exitHandler
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72 result.resizeHandler = resizeHandler
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73 result.eventHandler = eventHandler
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74 result.window = createWindow(applicationName)
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75
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76 var
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77 instanceExtensions: seq[string]
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78 enabledLayers: seq[string]
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79
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80 if debug:
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81 instanceExtensions.add "VK_EXT_debug_utils"
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82 enabledLayers.add "VK_LAYER_KHRONOS_validation"
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83 putEnv("VK_LAYER_ENABLES", "VK_VALIDATION_FEATURE_ENABLE_BEST_PRACTICES_EXT")
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84
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85 if defined(linux) and DEBUG:
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86 enabledLayers.add "VK_LAYER_MESA_overlay"
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87 result.instance = result.window.createInstance(
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88 vulkanVersion=VK_MAKE_API_VERSION(0, 1, 3, 0),
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89 instanceExtensions=instanceExtensions,
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90 layers=enabledLayers,
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91 )
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92 if debug:
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93 result.debugger = result.instance.createDebugMessenger()
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94 # create devices
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95 let selectedPhysicalDevice = result.instance.getPhysicalDevices().filterBestGraphics()
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96 result.device = result.instance.createDevice(
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97 selectedPhysicalDevice,
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98 enabledLayers = @[],
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99 enabledExtensions = @[],
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100 selectedPhysicalDevice.filterForGraphicsPresentationQueues()
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101 )
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102 startMixerThread()
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103
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104 proc setRenderer*(engine: var Engine, renderPass: RenderPass) =
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105 if engine.renderer.isSome:
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106 engine.renderer.get.destroy()
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107 engine.renderer = some(engine.device.initRenderer(renderPass))
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108
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109 proc addScene*(engine: var Engine, scene: Scene, vertexInput: seq[ShaderAttribute], samplers: seq[ShaderAttribute], transformAttribute="transform") =
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110 assert transformAttribute == "" or transformAttribute in map(vertexInput, proc(a: ShaderAttribute): string = a.name)
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111 assert engine.renderer.isSome
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112 engine.renderer.get.setupDrawableBuffers(scene, vertexInput, samplers, transformAttribute=transformAttribute)
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113
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114 proc renderScene*(engine: var Engine, scene: var Scene) =
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115 assert engine.state == Running
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116 assert engine.renderer.isSome
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117 engine.renderer.get.updateMeshData(scene)
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118 engine.renderer.get.updateUniformData(scene)
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119 engine.renderer.get.render(scene)
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120
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121 proc updateAnimations*(engine: var Engine, scene: var Scene, dt: float32) =
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122 assert engine.state == Running
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123 assert engine.renderer.isSome
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124 engine.renderer.get.updateAnimations(scene, dt)
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125
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126 proc updateInputs*(engine: var Engine): EngineState =
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127 assert engine.state in [Starting, Running]
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128
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129 engine.input.keyWasPressed = {}
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130 engine.input.keyWasReleased = {}
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131 engine.input.mouseWasPressed = {}
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132 engine.input.mouseWasReleased = {}
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133 engine.input.mouseWheel = 0
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134 engine.input.mouseMove = newVec2f()
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135 if engine.state == Starting:
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136 engine.input.windowWasResized = true
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137 var mpos = engine.window.getMousePosition()
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138 if mpos.isSome:
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139 engine.input.mousePosition = mpos.get
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140
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141 var killed = false
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142 for event in engine.window.pendingEvents():
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143 inc engine.input.eventsProcessed
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144 if engine.eventHandler != nil:
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145 engine.eventHandler(engine, event)
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146 case event.eventType:
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147 of Quit:
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148 killed = true
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149 of ResizedWindow:
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150 engine.input.windowWasResized = true
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151 of KeyPressed:
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152 engine.input.keyWasPressed.incl event.key
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153 engine.input.keyIsDown.incl event.key
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154 of KeyReleased:
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155 engine.input.keyWasReleased.incl event.key
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156 engine.input.keyIsDown.excl event.key
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157 of MousePressed:
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158 engine.input.mouseWasPressed.incl event.button
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159 engine.input.mouseIsDown.incl event.button
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160 of MouseReleased:
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161 engine.input.mouseWasReleased.incl event.button
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162 engine.input.mouseIsDown.excl event.button
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163 of MouseMoved:
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164 let newPos = newVec2(float32(event.x), float32(event.y))
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165 engine.input.mouseMove = newPos - engine.input.mousePosition
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166 engine.input.mousePosition = newPos
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167 of MouseWheel:
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168 engine.input.mouseWheel = event.amount
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169 if engine.state == Starting:
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170 engine.state = Running
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171 if killed:
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172 engine.state = Shutdown
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173 if engine.exitHandler != nil:
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174 engine.exitHandler(engine)
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175 if engine.input.windowWasResized and engine.resizeHandler != nil:
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176 engine.resizeHandler(engine)
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177 return engine.state
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178
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179 # wrappers for internal things
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180 func keyIsDown*(engine: Engine, key: Key): auto = key in engine.input.keyIsDown
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181 func keyWasPressed*(engine: Engine, key: Key): auto = key in engine.input.keyWasPressed
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182 func keyWasReleased*(engine: Engine, key: Key): auto = key in engine.input.keyWasReleased
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183 func mouseIsDown*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseIsDown
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184 func mouseWasPressed*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseWasPressed
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185 func mouseWasReleased*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseWasReleased
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186 func mousePosition*(engine: Engine): auto = engine.input.mousePosition
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187 func mouseMove*(engine: Engine): auto = engine.input.mouseMove
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188 func mouseWheel*(engine: Engine): auto = engine.input.mouseWheel
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189 func eventsProcessed*(engine: Engine): auto = engine.input.eventsProcessed
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190 func framesRendered*(engine: Engine): uint64 = (if engine.renderer.isSome: engine.renderer.get.framesRendered else: 0)
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191 func gpuDevice*(engine: Engine): Device = engine.device
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192 func getWindow*(engine: Engine): auto = engine.window
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193 func windowWasResized*(engine: Engine): auto = engine.input.windowWasResized
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194 func showSystemCursor*(engine: Engine) = engine.window.showSystemCursor()
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195 func hideSystemCursor*(engine: Engine) = engine.window.hideSystemCursor()
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196 proc fullscreen*(engine: var Engine, enable: bool) = engine.window.fullscreen(enable)