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annotate src/semicongine/engine.nim @ 140:29f0109c5222

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add: some helper functions
author Sam <sam@basx.dev>
date Sat, 22 Apr 2023 17:34:42 +0700
parents e6c7973d8525
children 9c0d7839dc91
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1 import ./platform/window
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2
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3 import ./vulkan/api
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4 import ./vulkan/instance
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5 import ./vulkan/device
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6 import ./vulkan/physicaldevice
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7 import ./vulkan/renderpass
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8
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9 import ./gpu_data
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10 import ./entity
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11 import ./renderer
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12 import ./events
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13 import ./config
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14 import ./math
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15
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16 type
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17 Input = object
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18 keyIsDown: set[Key]
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19 keyWasPressed: set[Key]
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20 keyWasReleased: set[Key]
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21 mouseIsDown: set[MouseButton]
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22 mouseWasPressed: set[MouseButton]
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23 mouseWasReleased: set[MouseButton]
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24 mousePosition: Vec2f
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25 eventsProcessed: uint64
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26 Engine* = object
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27 running*: bool
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28 device: Device
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29 debugger: Debugger
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30 instance: Instance
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31 window: NativeWindow
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32 renderer: Renderer
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33 input: Input
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34 exitHandler: proc(engine: var Engine)
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35 resizeHandler: proc(engine: var Engine)
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36 eventHandler: proc(engine: var Engine, event: Event)
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38
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39 proc destroy*(engine: var Engine) =
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40 checkVkResult engine.device.vk.vkDeviceWaitIdle()
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41 engine.renderer.destroy()
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42 engine.device.destroy()
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43 if engine.debugger.messenger.valid:
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44 engine.debugger.destroy()
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45 engine.window.destroy()
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46 engine.instance.destroy()
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47 engine.running = false
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48
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49
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50 proc initEngine*(
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51 applicationName: string,
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52 debug=DEBUG,
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53 exitHandler: proc(engine: var Engine) = nil,
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54 resizeHandler: proc(engine: var Engine) = nil,
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55 eventHandler: proc(engine: var Engine, event: Event) = nil
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56 ): Engine =
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57 result.running = true
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58 result.exitHandler = exitHandler
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59 result.resizeHandler = resizeHandler
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60 result.eventHandler = eventHandler
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61 result.window = createWindow(applicationName)
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62
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63 var
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64 instanceExtensions: seq[string]
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65 enabledLayers: seq[string]
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66
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67 if debug:
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68 instanceExtensions.add "VK_EXT_debug_utils"
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69 enabledLayers.add @["VK_LAYER_KHRONOS_validation", "VK_LAYER_MESA_overlay"]
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70 result.instance = result.window.createInstance(
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71 vulkanVersion=VK_MAKE_API_VERSION(0, 1, 3, 0),
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72 instanceExtensions=instanceExtensions,
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73 layers=enabledLayers,
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74 )
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75 if debug:
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76 result.debugger = result.instance.createDebugMessenger()
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77 # create devices
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78 let selectedPhysicalDevice = result.instance.getPhysicalDevices().filterBestGraphics()
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79 result.device = result.instance.createDevice(
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80 selectedPhysicalDevice,
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81 enabledLayers = @[],
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82 enabledExtensions = @[],
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83 selectedPhysicalDevice.filterForGraphicsPresentationQueues()
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84 )
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85
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86 proc setRenderer*(engine: var Engine, renderPass: RenderPass) =
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87 engine.renderer = engine.device.initRenderer(renderPass)
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88
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89 proc addScene*(engine: var Engine, entity: Entity, vertexInput: seq[ShaderAttribute]) =
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90 engine.renderer.setupDrawableBuffers(entity, vertexInput)
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91
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92 proc renderScene*(engine: var Engine, entity: Entity) =
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93 assert engine.renderer.valid
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94 if engine.running:
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95 engine.renderer.render(entity)
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96
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97 proc updateInputs*(engine: var Engine) =
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98 if not engine.running:
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99 return
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100
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101 engine.input.keyWasPressed = {}
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102 engine.input.keyWasReleased = {}
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103 engine.input.mouseWasPressed = {}
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104 engine.input.mouseWasReleased = {}
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105 var
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106 killed = false
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107 resized = false
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108 for event in engine.window.pendingEvents():
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109 inc engine.input.eventsProcessed
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110 if engine.eventHandler != nil:
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111 engine.eventHandler(engine, event)
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112 case event.eventType:
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113 of Quit:
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114 killed = true
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115 of ResizedWindow:
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116 resized = true
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117 of KeyPressed:
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118 engine.input.keyWasPressed.incl event.key
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119 engine.input.keyIsDown.incl event.key
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120 of KeyReleased:
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121 engine.input.keyWasReleased.incl event.key
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122 engine.input.keyIsDown.excl event.key
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123 of MousePressed:
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124 engine.input.mouseWasPressed.incl event.button
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125 engine.input.mouseIsDown.incl event.button
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126 of MouseReleased:
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127 engine.input.mouseWasReleased.incl event.button
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128 engine.input.mouseIsDown.excl event.button
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129 of MouseMoved:
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130 engine.input.mousePosition = newVec2(float32(event.x), float32(event.y))
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131 if killed:
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132 engine.running = false
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133 if engine.exitHandler != nil:
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134 engine.exitHandler(engine)
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135 if resized and engine.resizeHandler != nil:
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136 engine.resizeHandler(engine)
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137
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138 func keyIsDown*(engine: Engine, key: Key): auto = key in engine.input.keyIsDown
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139 func keyWasPressed*(engine: Engine, key: Key): auto = key in engine.input.keyWasPressed
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140 func keyWasReleased*(engine: Engine, key: Key): auto = key in engine.input.keyWasReleased
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141 func mouseIsDown*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseIsDown
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142 func mouseWasPressed*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseWasPressed
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143 func mouseWasReleased*(engine: Engine, button: MouseButton): auto = button in engine.input.mouseWasReleased
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144 func mousePosition*(engine: Engine, key: Key): auto = engine.input.mousePosition
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145 func eventsProcessed*(engine: Engine): auto = engine.input.eventsProcessed
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146 func framesRendered*(engine: Engine): auto = engine.renderer.framesRendered
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147 func gpuDevice*(engine: Engine): Device = engine.device
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148 func getWindow*(engine: Engine): auto = engine.window