Mercurial > hg > forks > multipaint-js
annotate draw_inputs.pde @ 7:c848a6133cfc
Fix many calculations (divisions) that assume integer variable division
semantics by truncating to int(). Also add two helper functions chop2(v)
and chop8(v) and use them where appropriate.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Tue, 03 Jul 2018 22:17:48 +0300 |
parents | a1261cd4c676 |
children | 72407a4d9539 |
rev | line source |
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1 // Collect all that "reads" the virtual image in some way or other |
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2 // plus other passive manipulations |
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3 |
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4 int odd(int v) { |
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5 if ((v | 1) == v) return 1; |
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6 return 0; |
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7 } |
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8 |
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9 int even(int v) { |
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10 if (v >> 1 == v) return 1; |
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11 return 0; |
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12 } |
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13 |
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14 float getangel(float xx, float yy) { |
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15 float ang = degrees(atan2(xx, -yy)); |
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16 if (ang < 0) return 360 + ang; |
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17 return ang; |
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18 } |
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19 |
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20 int zxcolor(int col) { |
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21 //something that allows different zx brightness colors treated logically as the same |
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22 //i.e. bright red and dark red the same. handy for brush transparency |
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23 if (g_britemode == 0) return col; |
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24 if (col > 7) return col - 8; |
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25 return col; |
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26 } |
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27 |
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28 //the "slow" call to mark "dirty block" |
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29 void updatepoint(int xx, int yy) { |
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30 if (yy < 0 || xx < 0 || xx >= X || yy >= Y) return; |
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31 xx = int(xx / 8); |
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32 yy = int(yy / 8); |
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33 int ad = xx + yy * MX; |
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34 g_redo[ad] = byte(0); //block update |
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35 g_remdo[ad] = byte(1); //block update |
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36 } |
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37 |
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38 int getmultibrush(int x1, int y1) { |
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39 |
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40 //returns the multicolor color on point x1,y1 at brush |
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41 |
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42 int ad, looks, mmc; |
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43 if (g_multic == 2) return g_brush[1024 + x1 + y1 * X]; |
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44 |
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45 ad = 1024 + x1 + y1 * X; |
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46 looks = 65536 + int(x1 / 8) + int(y1 / 8) * MX; |
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47 mmc = g_brush[ad] + g_brush[ad + 1] * 2; |
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48 switch (mmc) { |
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49 case 0: |
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50 return g_map[1]; |
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51 case 1: |
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52 return g_brush[looks]; |
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53 case 2: |
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54 return g_brush[looks + 1000]; |
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55 case 3: |
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56 if (machine == PLUS4M) return int(g_map[2]); |
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57 return g_brush[looks + 2000]; |
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58 } |
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59 return g_brush[ad] + g_brush[ad + 1] * 2; |
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60 } |
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61 |
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62 int getmultic(int x1, int y1, int mode) //mode 0=screen 1=brush |
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63 { |
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64 |
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65 //returns the multicolor color on point x1,y1 |
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66 |
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67 int ad, looks, mmc, source1, source2; |
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68 |
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69 if (g_multic == 2) { |
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70 looks = 1024 + x1 + y1 * X; |
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71 if (mode == 0) return g_map[looks]; |
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72 if (mode == 1) return g_brush[looks]; |
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73 } |
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74 x1 = chop2(x1); |
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75 ad = 1024 + x1 + y1 * X; |
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76 source1 = 0; |
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77 source2 = 0; |
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78 looks = 65536 + int(x1 / 8) + int(y1 / 8) * MX; |
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79 if (mode == 0) { |
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80 source1 = g_map[ad]; |
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81 source2 = g_map[ad + 1]; |
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82 } |
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83 if (mode == 1) { |
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84 source1 = g_brush[ad]; |
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85 source2 = g_brush[ad + 1]; |
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86 } |
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87 mmc = source1 + source2 * 2; |
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88 //source1=0 |
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89 //source2=+1 |
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90 //00=zeroc =0 |
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91 //01=color1=2 |
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92 //10=color2=1 |
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93 //11=color3=3 |
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94 |
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95 if (mode == 0) { |
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96 switch (mmc) { |
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97 case 0: |
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98 return g_map[1]; |
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99 case 1: |
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100 return g_map[looks]; |
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101 case 2: |
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102 return g_map[looks + 1000]; |
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103 case 3: |
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104 if (machine == PLUS4M) return int(g_map[2]); |
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105 return g_map[looks + 2000]; |
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106 } |
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107 } |
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108 if (mode == 1) { |
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109 switch (mmc) { |
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110 case 0: |
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111 return g_map[1]; |
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112 case 1: |
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113 return g_brush[looks]; |
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114 case 2: |
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115 return g_brush[looks + 1000]; |
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116 case 3: |
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117 if (machine == PLUS4M) return int(g_map[2]); |
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118 return g_brush[looks + 2000]; |
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119 } |
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120 } |
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121 return source1 + source2; |
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122 } |
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123 |
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124 int getattra(int xx, int yy, int mode) //mode foreground backround |
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125 { |
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126 //returns the internal foreground / background color on point xx,yy |
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127 int xv, yv, val; |
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128 if (g_multic == 2) { |
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129 if (mode == 0) return getmultic(xx, yy, 0); |
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130 return g_backg; |
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131 } |
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132 if (g_multic == 1) { |
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133 if (mode == 0) return getmultic(xx, yy, 0); |
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134 return g_map[1]; // was 0? |
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135 } |
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136 xx = int(xx / 8); |
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137 yv = int(yy / 8); |
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138 int ad = 65536 + xx + yy * MX; |
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139 if (mode == 0) { |
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140 val = g_map[ad]; |
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141 if (g_britemode == 1 && val == 8) return 0; |
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142 return val; |
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143 } |
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144 // if(mode==1) |
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145 val = g_map[ad + (MX * MY) * 8]; |
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146 if (g_britemode == 1 && val == 8) return 0; |
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147 return val; |
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148 } |
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149 |
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150 int getabsa(int xx, int yy, int mode) //mode 0=screen 1=brush |
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151 { |
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152 // returns the visible colour on point xx,yy |
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153 int sad, ssap, ad, val; |
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154 int chek; |
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155 val = 0; |
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156 sad = 1024 + xx + yy * X; |
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157 ad = 65536 + int(xx / 8) + yy * MX; |
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158 chek = int(g_map[sad]); |
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159 if (chek == 100 || chek == 200) return chek; |
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160 |
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161 if (mode == 0) { |
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162 ssap = int(g_map[sad]); |
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163 } else { |
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164 ssap = int(g_brush[sad]); |
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165 } |
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166 |
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167 if (ssap == 1) { |
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168 if (mode == 0) { |
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169 val = g_map[ad]; |
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170 } else { |
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171 val = g_brush[ad]; |
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172 } |
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173 if (g_britemode == 1 && val == 8) return 0; |
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174 return val; |
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175 } |
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176 if (ssap == 0) { |
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177 if (mode == 0) { |
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178 val = g_map[ad + (MX * MY) * 8]; |
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179 } else { |
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180 val = g_brush[ad + (MX * MY) * 8];; |
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181 } |
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182 if (g_britemode == 1 && val == 8) return 0; |
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183 return val; |
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184 } |
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185 return g_map[sad]; |
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186 } |
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187 |
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188 //the most accessible way to get a color index from a point |
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189 int easygetcolor(int xx, int yy) { |
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190 if (yy < 0 || xx < 0 || xx >= X || yy >= Y) return 0; |
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191 if (g_multic > 0) return getmultic(xx, yy, 0); |
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192 if (g_multic == 0) return getabsa(xx, yy, 0); |
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193 return 0; |
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194 } |
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195 |
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196 void infersize() { |
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197 int xx, yy, cp, molox, okay; |
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198 int bx, by; |
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199 storeparameters(); |
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200 xx = 0; |
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201 molox = 1; |
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202 okay = 0; |
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203 if (g_multic == 1 || g_hzoomer == 2) molox = 2; |
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204 cp = easygetcolor(0, 0); |
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205 for (xx = 0; xx < X; xx = xx + molox) { |
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206 if (easygetcolor(xx, 0) == cp && okay == 0) { |
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207 g_animx = xx; |
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208 } else { |
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209 okay = 1; |
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210 } |
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211 } |
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212 okay = 0; |
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213 for (yy = 0; yy < Y; yy++) { |
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214 if (easygetcolor(0, yy) == cp && okay == 0) { |
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215 g_animy = yy; |
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216 } else { |
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217 okay = 1; |
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218 } |
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219 } |
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220 |
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221 g_animx = g_animx + molox; |
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222 g_animy = g_animy + 1; |
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223 if (g_animx > 63 || g_animy > 63 || g_animx <= 2 || g_animy <= 2) { |
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224 message("BAD SIZE|See manual"); |
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225 restoreparameters(); |
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226 g_data[int('n')] = 0; |
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227 return; |
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228 } |
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229 int boldsourcex = g_bsourcex; |
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230 int boldsourcey = g_bsourcey; |
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231 int boldsourcex2 = g_bsourcex2; |
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232 int boldsourcey2 = g_bsourcey2; |
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233 |
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234 g_bsourcex = g_animx; |
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235 g_bsourcey = 0; |
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236 g_bsourcex2 = g_animx + g_animx - molox; |
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237 g_bsourcey2 = g_animy - 1; |
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238 g_animframes = 0; |
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239 g_animno = 1; |
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240 int raamit = -1; |
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241 for (yy = 0; yy <= Y; yy = yy + g_animy) { |
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242 for (xx = 0; xx <= X; xx = xx + g_animx) { |
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243 okay = 1; |
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244 for (bx = 0; bx < g_animx; bx = bx + molox) { |
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245 for (by = 0; by < g_animy; by++) { |
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246 if (easygetcolor(xx + bx, yy + by) != cp) okay = 0; |
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247 } |
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248 } |
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249 if (okay == 1 && g_animframes <= 1) g_animframes = raamit; |
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250 if (xx + g_animx < X || xx + g_animx == X) raamit++; |
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251 } |
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252 } |
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253 if (g_animframes <= 0) { |
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254 message("BAD BOOKEND|See manual"); |
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255 restoreparameters(); |
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256 g_data[int('n')] = 0; |
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257 g_bsourcex = boldsourcex; |
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258 g_bsourcey = boldsourcey; |
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259 g_bsourcex2 = boldsourcex2; |
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260 g_bsourcey2 = boldsourcey2; |
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261 return; |
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262 } |
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263 message("Play Brush|" + g_animx + " x " + g_animy + "|" + g_animframes + " frames"); |
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264 } |
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265 |
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266 void animbrush_do() { |
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267 int bx, by; |
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268 int horisize; |
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269 int molox = 1; |
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270 if (g_multic == 1) molox = 2; |
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271 horisize = int(X / g_animx); |
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272 g_animno = g_animno + 1; |
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273 if (g_animno > g_animframes) g_animno = 1; |
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274 by = int(g_animno / horisize); |
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275 bx = g_animno - (by * horisize); |
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276 g_bsourcex = bx * g_animx; |
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277 g_bsourcey = by * g_animy; |
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278 g_bsourcex2 = g_bsourcex + g_animx - molox; |
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279 g_bsourcey2 = g_bsourcey + g_animy - 1; |
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280 } |
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281 |
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282 void set_fixed_raster(int set) { |
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283 for (int i = 0; i < 64; i++) { |
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284 g_fixedraster[i] = g_rasterpatterns[set * 64 + i]; |
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285 } |
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286 } |
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287 |
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288 int get_raster(int xx, int yy) { |
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289 int molox = 1; |
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290 if (g_multic == 1 || g_hzoomer == 2) molox = 2; |
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291 xx = xx + g_raster_offset_x * molox; |
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292 yy = yy + g_raster_offset_y; |
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293 if (g_multic == 1 || g_hzoomer == 2) { |
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294 xx = int(xx / 2); |
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295 } |
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296 int mx = chop8(xx); |
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297 int my = chop8(yy); |
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298 xx = xx - mx; |
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299 yy = yy - my; |
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300 return g_fixedraster[xx + yy * 8]; |
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301 } |
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302 |
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303 void refreshpalette() { |
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304 //relevant for alterable palettes, such as amiga or cpc |
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305 if (g_palsteps == 0) return; |
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306 for (int i = 0; i < g_maxcolors; i++) { |
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307 makecolor(i, int(g_map[256 + i * 3]), int(g_map[256 + i * 3 + 1]), int(g_map[256 + i * 3 + 2])); |
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308 } |
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309 } |