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2 | Namespace ActiveBasic
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3 | Namespace OpenGL
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4 |
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5 | '色情報を扱うためのインターフェース
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6 | Class GLColor
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7 | Public /* property */
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8 | Abstract Function A() As Single
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9 | Abstract Function B() As Single
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10 | Abstract Function G() As Single
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11 | Abstract Function R() As Single
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12 | Abstract Function GetPtr() As *Single
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13 |
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14 | Public /* method */
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15 | Function Equals(c As GLColor) As Boolean
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16 | If (This.R = c.R) and (This.G = c.G) and (This.B = c.B) and (This.A = c.A) Then
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17 | Return True
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18 | Else
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19 | Return False
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20 | End If
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21 | End Function
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22 | Function GetBrightness() As Single
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23 | Return Detail.RGBToBrightness(This.R,This.G,This.B)
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24 | End Function
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25 | Function GetHue() As Single
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26 | Return Detail.RGBToHue(This.R,This.G,This.B)
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27 | End Function
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28 | Function GetSaturation() As Single
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29 | Return Detail.RGBToSaturation(This.R,This.G,This.B)
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30 | End Function
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31 |
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32 | Public /* operator */
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33 | Function Operator == (c As GLColor) As Boolean
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34 | Return Equals(c)
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35 | End Function
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36 | Function Operator <> (c As GLColor) As Boolean
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37 | Return Not Equals(c)
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38 | End Function
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39 | End Class
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40 |
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41 | Class Color3
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42 | Inherits GLColor
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43 | Public /* constractor */
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44 | Sub Color3()
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45 | color[0]=0.0
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46 | color[1]=0.0
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47 | color[2]=0.0
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48 | color[3]=1.0
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49 | End Sub
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50 | Sub Color3(red As Single, green As Single, blue As Single)
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51 | color[0]=red
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52 | color[1]=green
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53 | color[2]=blue
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54 | color[3]=1.0
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55 | End Sub
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56 | Sub Color3(c As System.Drawing.Color)
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57 | color[0]=c.R
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58 | color[1]=c.G
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59 | color[2]=c.B
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60 | color[3]=1.0
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61 | End Sub
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62 | Sub Color3(c As Color4)
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63 | color[0]=c.R
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64 | color[1]=c.G
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65 | color[2]=c.B
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66 | color[3]=1.0
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67 | End Sub
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68 |
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69 | Public /* property */
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70 | Override Function A() As Single
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71 | Return color[3]
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72 | End Function
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73 | Sub B(blue As Single)
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74 | color[2]=blue
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75 | End Sub
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76 | Override Function B() As Single
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77 | Return color[2]
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78 | End Function
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79 | Sub G(green As Single)
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80 | color[1]=green
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81 | End Sub
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82 | Function G() As Single
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83 | Return color[1]
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84 | End Function
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85 | Sub R(red As Single)
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86 | color[0]=red
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87 | End Sub
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88 | Override Function R() As Single
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89 | Return color[0]
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90 | End Function
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91 |
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92 | Public /* operator */
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93 | Function Operator () As Color4
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94 | Return New Color4(This,1.0)
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95 | End Function
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96 |
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97 | Public /* method */
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98 | Override Function GetPtr() As *Single
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99 | Return color
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100 | End Function
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101 |
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102 | Public /* static method */
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103 | Static Function FromCOLORREF(c As COLORREF) As GLColor
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104 | Dim r As Byte, g As Byte, b As Byte
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105 | r = c As Byte
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106 | g = (c>>8) As Byte
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107 | b = (c>>16) As Byte
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108 | Return New Color3(r/255.0,g/255.0,b/255.0)
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109 | End Function
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110 | Static Function FromHSB(hue As Single, saturation As Single, brightness As Single) As Color3
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111 | Return Detail.HSBToColor3(hue,saturation,brightness)
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112 | End Function
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113 | Static Function FromHLS(hue As Single, lightness As Single, saturation As Single) As Color3
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114 | Return Detail.HLSToColor3(hue, lightness, saturation)
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115 | End Function
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116 |
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117 | Protected
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118 | color[3] As Single
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119 | End Class
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120 |
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121 | Class Color4
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122 | Inherits GLColor
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123 |
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124 | Public /* constractor */
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125 | Sub Color4()
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126 | color[0]=0.0
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127 | color[1]=0.0
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128 | color[2]=0.0
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129 | color[3]=1.0
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130 | End Sub
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131 | Sub Color4(red As Single, green As Single, blue As Single, alpha As Single)
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132 | color[0]=red
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133 | color[1]=green
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134 | color[2]=blue
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135 | color[3]=alpha
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136 | End Sub
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137 | Sub Color4(c As System.Drawing.Color)
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138 | color[0]=c.R
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139 | color[1]=c.G
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140 | color[2]=c.B
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141 | color[3]=c.A
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142 | End Sub
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143 | Sub Color4(c As Color3, alpha As Single)
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144 | color[0]=c.R
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145 | color[1]=c.G
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146 | color[2]=c.B
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147 | color[3]=alpha
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148 | End Sub
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149 |
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150 | Public /* property */
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151 | Sub A(alpha As Single)
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152 | color[3]=alpha
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153 | End Sub
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154 | Override Function A() As Single
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155 | Return color[3]
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156 | End Function
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157 | Sub B(blue As Single)
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158 | color[2]=blue
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159 | End Sub
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160 | Override Function B() As Single
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161 | Return color[2]
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162 | End Function
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163 | Sub G(green As Single)
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164 | color[1]=green
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165 | End Sub
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166 | Function G() As Single
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167 | Return color[1]
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168 | End Function
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169 | Sub R(red As Single)
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170 | color[0]=red
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171 | End Sub
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172 | Override Function R() As Single
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173 | Return color[0]
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174 | End Function
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175 |
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176 | Function Operator () As Color3
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177 | Return New Color3(This)
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178 | End Function
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179 |
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180 | Public /* method */
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181 | Override Function GetPtr() As *Single
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182 | Return color
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183 | End Function
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184 |
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185 | Public /* static method */
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186 | Static Function FromCOLORREF(c As COLORREF) As Color4
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187 | Dim r As Byte, g As Byte, b As Byte
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188 | r = c As Byte
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189 | g = (c>>8) As Byte
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190 | b = (c>>16) As Byte
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191 | Return New Color4(r/255.0,g/255.0,b/255.0,1.0)
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192 | End Function
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193 | Static Function FromHSB(hue As Single, saturation As Single, brightness As Single) As Color4
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194 | Return Detail.HSBToColor3(hue,saturation,brightness)
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195 | End Function
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196 | Static Function FromHLS(hue As Single, lightness As Single, saturation As Single) As Color4
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197 | Return Detail.HLSToColor3(hue, lightness, saturation)
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198 | End Function
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199 |
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200 | Protected
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201 | color[3] As Single
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202 | End Class
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203 |
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204 | Namespace Detail
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205 | Function HSBToColor3(hue As Single, saturation As Single, brightness As Single) As Color3
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206 | 'cramping
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207 | If hue >= 360.0 Then hue = 0.0
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208 | If hue < 0.0 Then hue = 0.0
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209 | If saturation > 1.0 Then saturation = 1.0
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210 | If saturation < 0.0 Then saturation = 0.0
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211 | If brightness > 1.0 Then brightness = 1.0
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212 | If brightness < 0.0 Then brightness = 0.0
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213 |
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214 | 'grayscale
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215 | If saturation = 0.0 Then
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216 | Return New Color3(brightness,brightness,brightness)
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217 | End If
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218 |
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219 | Dim i = Int(hue/60.0) As Long
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220 | Dim f = hue/60.0 - i As Single
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221 | Dim v = brightness As Single
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222 | Dim m = brightness * (1.0 - saturation) As Single
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223 | Dim n = brightness * (1.0 - saturation*f) As Single
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224 | Dim k = brightness * (1.0 - saturation*(1.0 - f)) As Single
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225 |
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226 | Dim r As Single, g As Single, b As Single
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227 |
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228 | Select Case i
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229 | Case 0
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230 | r = v
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231 | g = k
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232 | b = m
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233 | Case 1
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234 | r = n
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235 | g = v
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236 | b = m
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237 | Case 2
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238 | r = m
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239 | g = v
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240 | b = k
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241 | Case 3
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242 | r = m
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243 | g = n
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244 | b = v
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245 | Case 4
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246 | r = k
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247 | g = m
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248 | b = v
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249 | Case 5
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250 | r = v
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251 | g = m
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252 | b = n
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253 | End Select
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254 | Return New Color3(r,g,b)
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255 | End Function
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256 |
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257 | Function HLSToColor3(hue As Single, lightness As Single, saturation As Single) As Color3
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258 | 'cramping
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259 | If hue >= 360.0 Then hue = 0.0
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260 | If hue < 0.0 Then hue = 0.0
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261 | If lightness > 1.0 Then lightness = 1.0
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262 | If lightness < 0.0 Then lightness = 0.0
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263 | If saturation > 1.0 Then saturation = 1.0
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264 | If saturation < 0.0 Then saturation = 0.0
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265 |
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266 | 'max - min
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267 | Dim max As Single
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268 | Dim min As Single
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269 | If lightness =< 0.5 Then
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270 | min = lightness * (1.0 - saturation)
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271 | max = 2*lightness - min
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272 | Else
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273 | max = lightness * (1.0 - saturation) + saturation
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274 | min = 2*lightness - max
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275 | End If
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276 |
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277 | 'grayscale
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278 | If saturation = 0.0 Then
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279 | Return New Color3(lightness,lightness,lightness)
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280 | End If
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281 |
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282 | Dim r As Single, g As Single, b As Single
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283 |
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284 | 'red
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285 | Dim h = hue + 120.0 As Single
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286 | If h > 360.0 Then h -= 360.0
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287 | If h < 60.0 Then
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288 | r = min + (max - min)*h/60.0
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289 | ElseIf (h => 60.0) and (h < 180.0) Then
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290 | r = max
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291 | ElseIf (h => 180.0) and (h < 240.0) Then
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292 | r = min + (max - min)*(240.0-h)/60.0
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293 | ElseIf h => 240.0 Then
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294 | r = min
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295 | End If
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296 |
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297 | 'green
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298 | h = hue
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299 | If h < 60.0 Then
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300 | g = min + (max - min)*h/60.0
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301 | ElseIf (h => 60.0) and (h < 180.0) Then
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302 | g = max
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303 | ElseIf (h => 180.0) and (h < 240.0) Then
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304 | g = min + (max - min)*(240.0-h)/60.0
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305 | ElseIf h => 240.0 Then
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306 | g = min
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307 | End If
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308 |
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309 |
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310 | 'blue
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311 | h = hue - 120.0 As Single
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312 | If h < 0.0 Then h += 360.0
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313 |
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314 | If h < 60.0 Then
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315 | b = min + (max - min)*h/60.0
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316 | ElseIf (h => 60.0) and (h < 180.0) Then
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317 | b = max
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318 | ElseIf (h => 180.0) and (h < 240.0) Then
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319 | b = min + (max - min)*(240.0-h)/60.0
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320 | ElseIf h => 240.0 Then
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321 | b = min
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322 | End If
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323 |
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324 | Return New Color3(r,g,b)
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325 | End Function
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326 |
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327 | Function RGBToHue(red As Single, green As Single, blue As Single) As Single
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328 | Dim max As Single, min As Single, d As Single
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329 | max = System.Math.Max(System.Math.Max(red, green), blue)
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330 | min = System.Math.Min(System.Math.Min(red, green), blue)
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331 | d = max - min
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332 | If green = max Then
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333 | Return ((blue - red) / d * 60.0 + 120.0) As Single
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334 | ElseIf blue = max Then
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335 | Return ((red - green) / d * 60 + 240) As Single
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336 | ElseIf green < blue Then
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337 | Return ((green - blue) / d * 60 + 360) As Single
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338 | Else
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339 | Return ((green - blue) / d * 60) As Single
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340 | EndIf
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341 | End Function
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342 |
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343 | Function RGBToSaturation(red As Single, green As Single, blue As Single) As Single
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344 | Dim max = System.Math.Max(System.Math.Max(red, green), blue) As Single
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345 | Dim min = System.Math.Min(System.Math.Min(red, green), blue) As Single
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346 | Return (max - min) / max
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347 | End Function
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348 |
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349 | Function RGBToBrightness(red As Single, green As Single, blue As Single) As Single
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350 | Dim max = System.Math.Max(System.Math.Max(red, green), blue)
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351 | Return max
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352 | End Function
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353 | End Namespace
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354 | End Namespace
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355 | End Namespace
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