1 | /* |
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2 | orxonox - the future of 3D-vertical-scrollers |
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3 | |
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4 | Copyright (C) 2004 orx |
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5 | |
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6 | This program is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | ### File Specific: |
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12 | main-programmer: ... |
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13 | co-programmer: ... |
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14 | */ |
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15 | |
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16 | //#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_ |
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17 | |
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18 | #include "quick_animation.h" |
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19 | |
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20 | #include "compiler.h" |
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21 | #include "debug.h" |
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22 | #ifndef NULL |
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23 | #define NULL 0 |
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24 | #endif |
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25 | |
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26 | |
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27 | using namespace std; |
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28 | |
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29 | |
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30 | /** |
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31 | \brief standard constructor |
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32 | */ |
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33 | QuickAnimation::QuickAnimation (void) |
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34 | { |
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35 | this->setClassName("QuickAnimation"); |
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36 | |
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37 | this->first = this->current = NULL; |
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38 | } |
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39 | |
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40 | |
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41 | /** |
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42 | \brief standard deconstructor |
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43 | |
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44 | */ |
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45 | QuickAnimation::~QuickAnimation (void) |
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46 | { |
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47 | this->current = this->first; |
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48 | QuickKeyFrame delKF; |
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49 | |
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50 | while (this->current != NULL) |
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51 | { |
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52 | this->first = this->current->next; |
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53 | delete this->current; |
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54 | this->current = this->first; |
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55 | } |
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56 | |
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57 | } |
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58 | |
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59 | /** |
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60 | \brief adds a new entry to the list of keyframes |
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61 | \param position the position to add the key to |
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62 | \param value the Value to set for the position |
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63 | \returns false if the key existed already for a given position |
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64 | */ |
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65 | bool QuickAnimation::addEntry(float position, float value) |
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66 | { |
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67 | this->current = this->first; |
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68 | while (this->current != NULL) |
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69 | { |
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70 | // if it is between some keyframes |
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71 | if ((!this->current->next && this->current->position < position) |
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72 | || (this->current->position < position && this->current->next->position > position)) |
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73 | break; |
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74 | // if it is the same as an already existing keyframe |
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75 | else if (this->current->position == position) |
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76 | return false; |
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77 | this->current = this->current->next; |
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78 | } |
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79 | |
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80 | QuickKeyFrame* newKey = new QuickKeyFrame; |
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81 | if (this->first == NULL) |
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82 | { |
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83 | this->first = newKey; |
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84 | this->current = newKey; |
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85 | newKey->next = NULL; |
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86 | } |
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87 | else |
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88 | { |
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89 | newKey->next = this->current->next; |
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90 | this->current->next = newKey; |
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91 | } |
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92 | newKey->value = value; |
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93 | newKey->position = position; |
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94 | |
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95 | this->current = this->first; |
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96 | } |
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97 | |
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98 | /** |
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99 | \brief returns the value of the animation at a certain position |
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100 | \param position the position to get the value from :) |
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101 | */ |
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102 | float QuickAnimation::getValue(float position) |
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103 | { |
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104 | if (unlikely(this->first == NULL)) |
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105 | return 0.0; |
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106 | else if (unlikely (this->first->next == NULL)) |
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107 | return this->first->value; |
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108 | else |
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109 | { |
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110 | if (unlikely(position < this->current->position)) |
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111 | { |
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112 | if (position <= this->first->position) |
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113 | return this->first->value; |
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114 | this->current = this->first; |
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115 | } |
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116 | while (likely(this->current->next != NULL && position > this->current->next->position)) |
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117 | this->current = this->current->next; |
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118 | if (this->current->next == NULL) |
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119 | return this->current->value; |
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120 | |
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121 | return this->current->value + (this->current->next->value - this->current->value) |
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122 | * ((position-this->current->position) / (this->current->next->position -this->current->position)); |
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123 | } |
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124 | } |
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125 | |
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126 | |
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127 | void QuickAnimation::debug(void) |
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128 | { |
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129 | this->current = this->first; |
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130 | |
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131 | PRINT(0)("QuickAnim:: (position, value)"); |
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132 | while(this->current) |
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133 | { |
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134 | PRINT(0)("->(%f, %f)", this->current->position, this->current->value); |
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135 | this->current = this->current->next; |
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136 | } |
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137 | |
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138 | PRINT(0)("\n"); |
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139 | this->current = this->first; |
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140 | } |
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