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1 #include <math.h>
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2 #include <stdlib.h>
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3 #include "SceneGraphRoot.h"
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511
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4 #include "MainLoop.h"
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5 #include "ball_xml.h"
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6 #include "ball_bound.h"
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7
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8 // prototype
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9 static void ball_move(SceneGraphPtr node, int screen_w, int screen_h);
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10 static void ball_collision(SceneGraphPtr node, int screen_w, int screen_h, SceneGraphPtr tree);
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11 static void ball_collision_idle(SceneGraphPtr, int w, int h, SceneGraphPtr tree);
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12
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13
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14 static float vy = 0.0f; // y 方向速度
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15 static float dt = 1.0/1.0f; // frame rate
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16
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17 static float e = -0.8f; // 反発係数
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18 static float g = 9.8f; // 重力加速度
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19 //static float v0 = 0.0f; // 初速は 0
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20
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21 static float h0; // 初期高さ
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22 static float ball_radius = 100.0f;
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23
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24 static float speed = 10.0f;
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25
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26 static void
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27 ball_move_idle2(SceneGraphPtr node, int screen_w, int screen_h)
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28 {
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29 Pad *pad = sgroot->getController();
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30
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31 if (pad->circle.isHold()) {
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32 if (pad->left.isHold()) {
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33 node->xyz[0] -= speed;
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34 if(node->xyz[0] < ball_radius)
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35 node->xyz[0] = ball_radius;
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36 } else if (pad->right.isHold()) {
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37 node->xyz[0] += speed;
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38 if(node->xyz[0] > screen_w - ball_radius)
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39 node->xyz[0] = screen_w - ball_radius;
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40 }
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41
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42 if (pad->up.isHold()) {
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43 node->xyz[1] -= speed;
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44 } else if (pad->down.isHold()) {
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45 node->xyz[1] += speed;
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46 if(node->xyz[1] > screen_h - ball_radius)
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47 node->xyz[1] = screen_h - ball_radius;
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48 }
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49 } else {
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50 node->set_move_collision(ball_move, ball_collision);
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51 }
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52 }
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53
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54 static int time = 0;
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55
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56 static void
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57 ball_move_idle(SceneGraphPtr node, int screen_w, int screen_h)
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58 {
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59 Pad *pad = sgroot->getController();
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60
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61 if (pad->circle.isPush()) {
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62 node->set_move_collision(ball_move_idle2, ball_collision_idle);
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63 time = 0;
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64 }
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65
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66 time++;
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67
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68 if (time > 90) {
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69 float w = (float)random();
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70
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71 w = fmodf(w, screen_w - ball_radius*2);
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72 node->xyz[0] = w + ball_radius;
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73 node->xyz[1] = h0;
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74 node->set_move_collision(ball_move, ball_collision);
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75 time = 0;
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76 }
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77 }
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78
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79 static void
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80 ball_move(SceneGraphPtr node, int screen_w, int screen_h)
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81 {
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82 vy += g * dt;
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83 node->xyz[1] += vy * dt;
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84 // node->xyz[0] += 10.0f;
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85 }
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86
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87 static void
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88 ball_collision_idle(SceneGraphPtr, int w, int h, SceneGraphPtr tree)
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89 {
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90 }
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91
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92 static void
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93 ball_collision(SceneGraphPtr node, int screen_w, int screen_h,
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94 SceneGraphPtr tree)
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95 {
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96 if (node->xyz[1] > screen_h - ball_radius) {
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97 node->xyz[1] = screen_h - ball_radius;
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98
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99 vy *= e;
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100 if (vy > -g && vy < 0) {
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101 vy = 0.0;
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102 node->set_move_collision(ball_move_idle, ball_collision_idle);
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103 }
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104 }
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105 }
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106
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107 MainLoopPtr
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108 ball_bound::init(Viewer *viewer, int screen_w, int screen_h)
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109 {
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110 SceneGraphPtr ball;
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111
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112 // 固定した値で srandom すると、毎回同じ、random() 列が生成される
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113 // random な値が欲しいなら、man random に方法が書いてあります。
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114 srandom(100);
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115
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116 viewer->createFromXMLfile("xml_file/Ball.xml");
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117
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118 ball = viewer->createSceneGraph(Ball);
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119 ball->set_move_collision(ball_move, ball_collision);
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120
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121 h0 = screen_h/2;
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122 h0 = -1000;
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123
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124 ball->xyz[0] = screen_w/2;
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125 //ball->xyz[0] = 0.0f;
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126 ball->xyz[1] = h0;
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127 ball->xyz[2] = 30.0f;
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128
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129 viewer->setSceneData(ball);
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130
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131 return viewer;
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132 }
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133
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134 /* end */
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