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annotate src/semicongine/scene.nim @ 263:d1ee2a815fa1

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add: some api improvments, preparing for font-loading
author Sam <sam@basx.dev>
date Sat, 27 May 2023 13:44:02 +0700
parents 0fab53ca30b7
children fd1a95f433d1
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diff changeset
1 import std/strformat
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2 import std/strutils
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3 import std/tables
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4 import std/hashes
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5 import std/typetraits
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6
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7 import ./core
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8
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9 type
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10 Component* = ref object of RootObj
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11 entity*: Entity
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13 Scene* = object
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14 name*: string
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15 root*: Entity
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16 shaderGlobals*: Table[string, DataList]
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17 textures*: Table[string, seq[Texture]]
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18
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19 Entity* = ref object of RootObj
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20 name*: string
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21 transform*: Mat4 # todo: cache transform + only update VBO when transform changed
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22 parent*: Entity
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23 children*: seq[Entity]
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24 components*: seq[Component]
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26 func getModelTransform*(entity: Entity): Mat4 =
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27 result = Unit4
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28 var currentEntity = entity
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29 while currentEntity != nil:
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30 result = currentEntity.transform * result
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31 currentEntity = currentEntity.parent
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32
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33 func addShaderGlobal*[T](scene: var Scene, name: string, data: T) =
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34 scene.shaderGlobals[name] = newDataList(thetype=getDataType[T]())
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35 setValues(scene.shaderGlobals[name], @[data])
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36
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37 func addShaderGlobalArray*[T](scene: var Scene, name: string, data: seq[T]) =
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38 scene.shaderGlobals[name] = newDataList(thetype=getDataType[T]())
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39 setValues(scene.shaderGlobals[name], data)
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41 func getShaderGlobal*[T](scene: Scene, name: string): T =
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42 getValues[T](scene.shaderGlobals[name])[0]
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43
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44 func getShaderGlobalArray*[T](scene: Scene, name: string): seq[T] =
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45 getValues[T](scene.shaderGlobals[name])
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47 func setShaderGlobal*[T](scene: var Scene, name: string, value: T) =
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48 setValues[T](scene.shaderGlobals[name], @[value])
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49
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50 func setShaderGlobalArray*[T](scene: var Scene, name: string, value: seq[T]) =
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51 setValues[T](scene.shaderGlobals[name], value)
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52
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53 func addTextures*(scene: var Scene, name: string, textures: seq[Texture], interpolation=VK_FILTER_LINEAR) =
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54 scene.textures[name] = textures
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55
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56 func addTexture*(scene: var Scene, name: string, texture: Texture) =
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57 scene.textures[name] = @[texture]
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59 func newScene*(name: string, root: Entity): Scene =
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60 Scene(name: name, root: root)
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62 func hash*(scene: Scene): Hash =
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63 hash(scene.name)
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65 func `==`*(a, b: Scene): bool =
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66 a.name == b.name
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67
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68 func hash*(entity: Entity): Hash =
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69 hash(cast[pointer](entity))
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71 func hash*(component: Component): Hash =
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72 hash(cast[pointer](component))
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73
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74 method `$`*(entity: Entity): string {.base.} = entity.name
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75 method `$`*(component: Component): string {.base.} =
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76 "Unknown Component"
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77
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78 proc prettyRecursive*(entity: Entity): seq[string] =
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79 var compList: seq[string]
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80 for comp in entity.components:
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81 compList.add $comp
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82
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83 var trans = entity.transform.col(3)
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84 var pos = entity.getModelTransform().col(3)
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85 result.add "- " & $entity & " [" & $trans.x & ", " & $trans.y & ", " & $trans.z & "] -> [" & $pos.x & ", " & $pos.y & ", " & $pos.z & "]"
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86 if compList.len > 0:
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87 result.add " [" & compList.join(", ") & "]"
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88
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89 for child in entity.children:
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90 for childLine in child.prettyRecursive:
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91 result.add " " & childLine
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92
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93 proc pretty*(entity: Entity): string =
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94 entity.prettyRecursive.join("\n")
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95
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96 proc add*(entity: Entity, child: Entity) =
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97 child.parent = entity
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98 entity.children.add child
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99 proc add*(entity: Entity, component: Component) =
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100 component.entity = entity
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101 entity.components.add component
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102 proc add*(entity: Entity, children: seq[Entity]) =
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103 for child in children:
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104 child.parent = entity
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105 entity.children.add child
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106 proc add*(entity: Entity, components: seq[Component]) =
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107 for component in components:
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108 component.entity = entity
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109 entity.components.add component
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110
109
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111 func newEntity*(name: string = ""): Entity =
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112 result = new Entity
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113 result.name = name
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114 result.transform = Unit4
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115 if result.name == "":
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116 result.name = &"Entity[{$(cast[ByteAddress](result))}]"
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117
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118 func newEntity*(name: string, firstChild: Entity, children: varargs[Entity]): Entity =
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119 result = new Entity
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120 result.add firstChild
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121 for child in children:
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122 result.add child
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123 result.name = name
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124 result.transform = Unit4
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125 if result.name == "":
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126 result.name = &"Entity[{$(cast[ByteAddress](result))}]"
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127
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128 proc newEntity*(name: string, firstComponent: Component, components: varargs[Component]): Entity =
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129 result = new Entity
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130 result.name = name
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131 result.add firstComponent
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132 for component in components:
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133 result.add component
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134 if result.name == "":
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135 result.name = &"Entity[{$(cast[ByteAddress](result))}]"
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136 result.transform = Unit4
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138 iterator allEntitiesOfType*[T: Entity](root: Entity): T =
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139 var queue = @[root]
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140 while queue.len > 0:
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141 let entity = queue.pop
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142 if entity of T:
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143 yield T(entity)
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144 for i in countdown(entity.children.len - 1, 0):
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145 queue.add entity.children[i]
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146
128
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147 iterator allComponentsOfType*[T: Component](root: Entity): var T =
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148 var queue = @[root]
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149 while queue.len > 0:
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150 let entity = queue.pop
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151 for component in entity.components.mitems:
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152 if component of T:
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153 yield T(component)
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154 for i in countdown(entity.children.len - 1, 0):
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155 queue.add entity.children[i]
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156
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157 func firstWithName*(root: Entity, name: string): Entity =
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158 var queue = @[root]
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159 while queue.len > 0:
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160 let next = queue.pop
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161 for child in next.children:
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162 if child.name == name:
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163 return child
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164 queue.add child
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165
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166 func `[]`*(scene: Scene, name: string): Entity =
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167 return scene.root.firstWithName(name)
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168
122
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169 func firstComponentWithName*[T: Component](root: Entity, name: string): T =
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170 var queue = @[root]
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171 while queue.len > 0:
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172 let next = queue.pop
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173 for child in next.children:
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174 if child.name == name:
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175 for component in child.components:
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176 if component of T:
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177 return T(component)
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178 queue.add child
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179
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180 func allWithName*(root: Entity, name: string): seq[Entity] =
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181 var queue = @[root]
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182 while queue.len > 0:
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183 let next = queue.pop
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184 for child in next.children:
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185 if child.name == name:
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186 result.add child
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187 queue.add child
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188
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189 func allComponentsWithName*[T: Component](root: Entity, name: string): seq[T] =
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190 var queue = @[root]
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191 while queue.len > 0:
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192 let next = queue.pop
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193 for child in next.children:
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194 if child.name == name:
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195 for component in child.components:
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196 if component of T:
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197 result.add T(component)
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198 queue.add child
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199
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200 iterator allEntities*(root: Entity): Entity =
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201 var queue = @[root]
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202 while queue.len > 0:
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203 let next = queue.pop
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204 for child in next.children:
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205 queue.add child
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206 yield next