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annotate nodejs/animate.js @ 798:210e4d24a3ba

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Change linear to relative location shifting and add rotate
author Thinker K.F. Li <thinker@codemud.net>
date Tue, 31 Aug 2010 14:52:12 +0800
parents 46a4cd4d382b
children 55875133fa60
rev   line source
794
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Thinker K.F. Li <thinker@codemud.net>
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1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
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2 // vim: sw=4:ts=8:sts=4:ai
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3 var sys=require("sys");
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4
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5 /*
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6 * This is configuration for animate module. For slower or speeder
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7 * machines, ffs can be decreased or increased respective.
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8 */
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9 var ffs = 20;
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10 var frame_interval = 1000 / ffs;
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11
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12 function linear_draw() {
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13 var percent;
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14
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15 this.percent = this.percent + this.step;
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16 percent = this.percent;
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17 if (percent > 1) percent = 1;
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18
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19 this.c++;
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20 if(percent >= 1) {
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21 this.obj.timer.stop();
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22 delete this.obj.timer;
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23 }
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24
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a843f147c995 Add Y coordiante in the linear animation.
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25 this.obj[2] = (this.targetx-this.startposx)*percent+this.startposx;
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26 this.obj[5] = (this.targety-this.startposy)*percent+this.startposy;
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27 this.app.refresh();
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28 }
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29
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30 function linear_draw_start() {
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31 var obj = this.obj;
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32 var self = this;
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33
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34 if(obj.timer)
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35 obj.timer.stop();
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36
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37 this.startposx = obj[2];
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38 this.startposy = obj[5];
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39 this.c = 0;
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40 this.step = 1000 / (this.duration * ffs);
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41 this.percent = 0;
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42 obj.timer = setInterval(function() { self.draw(); }, frame_interval);
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43 }
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44
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45 function linear(app,obj,shiftx,shifty,duration) {
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46 obj.animated_linear = this;
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47 this.app = app;
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48 this.obj = obj;
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49 this.end = 0;
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50 this.targetx = shiftx + obj[2];
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51 this.targety = shifty + obj[5];
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52 this.duration = duration*1000;
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53 }
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54
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55 exports.linear = linear;
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56 linear.prototype.start = linear_draw_start;
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57 linear.prototype.draw = linear_draw;
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58
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59 /* ------------------------------------------------------------ */
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60 function rotate(app, obj, ang, duration) {
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61 this._app = app;
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62 this._obj = obj;
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63 this._ang = ang;
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64 this._duration = duration;
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65 }
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66
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67 function rotate_start() {
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68 var obj = this._obj;
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69 var self = this;
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70
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71 this._step = 1 / (ffs * this._duration);
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72 this._percent = 0;
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73 this._start_mtx = [obj[0], obj[1], obj[2], obj[3], obj[4], obj[5]];
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74 obj.timer = setInterval(function() { self.draw(); }, frame_interval);
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75 }
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76
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77 function rotate_draw() {
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78 var percent;
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79 var ang;
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80 var sv, cv;
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81 var obj = this._obj;
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82 var mtx, shift;
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83
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84 this._percent = percent = this._percent + this._step;
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85 if(percent > 1) {
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86 percent = 1;
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87 obj.timer.stop();
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88 }
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89
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90 ang = percent * this._ang;
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91 sv = Math.sin(ang);
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92 cv = Math.cos(ang);
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93 mtx = [cv, -sv, 0, sv, cv, 0];
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94
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95 shift = [1, 0, -obj.center_x, 0, 1, -obj.center_y];
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96 mtx = multiply(mtx, shift);
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97 shift = [1, 0, obj.center_x, 0, 1, obj.center_y];
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98 mtx = multiply(shift, mtx);
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99 mtx = multiply(mtx, this._start_mtx);
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100
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101 obj[0] = mtx[0];
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102 obj[1] = mtx[1];
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103 obj[2] = mtx[2];
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104 obj[3] = mtx[3];
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105 obj[4] = mtx[4];
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106 obj[5] = mtx[5];
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107
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108 this._app.refresh();
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109 }
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110
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111 rotate.prototype.start = rotate_start;
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112 rotate.prototype.draw = rotate_draw;
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113 exports.rotate = rotate;
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114
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115 function multiply(s,d) {
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116 var m=[];
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117 m[0] = s[0]*d[0]+s[1]*d[3];
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118 m[1] = s[0]*d[1]+s[1]*d[4];
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119 m[2] = s[0]*d[2]+s[1]*d[5]+s[2];
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120 m[3] = s[3]*d[0]+s[4]*d[3];
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121 m[4] = s[3]*d[1]+s[4]*d[4];
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122 m[5] = s[3]*d[2]+s[4]*d[5]+s[5];
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123 return m;
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124 }
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125
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126
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127 function scale_draw() {
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128 if (this.end == 1) return;
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129 var percent = (Date.now() - this.starttime)/this.duration;
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130 if (percent > 1) percent = 1;
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131 var sx = (this.targetx-this.startsx)*percent+this.startsx;
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132 var sy = (this.targety-this.startsy)*percent+this.startsy;
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133 var t=[sx,0,0,0,sy,0];
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134 this.obj[0] = sx;
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135 this.obj[4] = sy;
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136 this.obj[2] = this.origin_offset_x - (sx-this.startsx)*this.obj.center.x;
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137 this.obj[5] = this.origin_offset_y - (sy-this.startsy)*this.obj.center.y;
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138
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139 this.app.refresh();
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140 var self = this;
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141 if (percent < 1) {
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142 this.obj.timer=setTimeout(function() { self.draw();}, 20);
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143 return;
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144 }
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145 this.app.refresh();
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146 this.obj.animated_scale = null;
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147 }
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148
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149 function scale(app,obj,targetx,targety, duration) {
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150 try {
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151 if (obj.animated_scale) {
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152 //obj[0] = obj.animated_scale.targetx;
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153 //obj[4] = obj.animated_scale.targety;
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154 //obj[2] = obj.animated_scale.final_offset_x;
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155 //obj[5] = obj.aninated_scale.final_offset_y;
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156 obj.animated_scale.end = 1;
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157 }
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158 } catch(e) {
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159
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160 }
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161 obj.animated_scale = this;
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162 this.app = app;
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163 this.obj = obj;
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164 this.end = 0;
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165 this.starttime = Date.now();
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166 this.startsx = obj[0];
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167 this.startsy = obj[4];
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168 this.targetx = targetx;
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169 this.targety = targety;
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170 this.duration = duration*1000;
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171 this.origin_offset_x = obj[2];
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172 this.origin_offset_y = obj[5];
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173 this.final_offset_x = this.origin_offset_x-(targetx-this.startsx)*obj.center.x;
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174 this.final_offset_y = this.origin_offset_y-(targety-this.startsy)*obj.center.y;
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175 }
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176
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177
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178 exports.scale = scale;
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179 scale.prototype.start = scale_draw;
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180 scale.prototype.draw = scale_draw;
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181
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182 function holder(app, coord) {
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183 var mtx = [coord[0], coord[1], coord[2], coord[3], coord[4], coord[5]];
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184
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185 this._mtx = mtx;
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186 this._coord = coord;
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187 this._app = app;
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188 }
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189
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190 holder.prototype = {
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191 go_center: function(o) {
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192 var sx, sy;
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193
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194 sx = o.center_x - this._coord.center_x;
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195 sy = o.center_y - this._coord.center_y;
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196 this.shift(sx, sy);
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197 },
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198
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199 home: function() {
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200 this._coord[2] = this._mtx[2];
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201 this._coord[5] = this._mtx[5];
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202 this._app.refresh();
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203 },
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204
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205 shift: function(sx, sy) {
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206 this._coord[2] = this._mtx[2] + sx;
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207 this._coord[5] = this._mtx[5] + sy;
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208 this._app.refresh();
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209 }
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210 };
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211
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212 exports.holder = holder;