(11) Cocos2d-x3.3RC0之LightTest分析

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1、头文件

[cpp] view plain copy
  1. //LightTest.h
  2. classLightTest:publicLayer
  3. {
  4. public:
  5. CREATE_FUNC(LightTest);
  6. LightTest();
  7. virtual~LightTest();
  9. virtualvoidupdate(floatdelta);
  10. voidSwitchLight(Ref*sender,LightTypelightType);//转换光源
  12. private:
  13. voidaddSprite();//添加精灵
  14. voidaddLights();//添加光源
  15. private:
  16. AmbientLight*_ambientLight;//环境光，想四周发射光线，模拟一个屋子的环境，光线来源方向不定。
  17. DirectionLight*_directionalLight;//方向光，表示一个非常远的光源，投射光线是平行的，用来模拟太阳光
  18. PointLight*_pointLight;//点光，从空间某点向四周均匀发射有限长的光线，用来模拟向四周发射状的光
  19. SpotLight*_spotLight;//聚光，从某点发射一个圆锥形状，用来模拟台灯
  20. Label*_ambientLightLabel;
  21. Label*_directionalLightLabel;
  22. Label*_pointLightLabel;
  23. Label*_spotLightLabel;
  24. };

2、Cpp文件

[cpp] view plain copy
  1. #include"LightTest.h"
  2. //构造函数，初始化除环境光AmbientLight之外的三种光为nullptr
  3. LightTest::LightTest()
  4. :_directionalLight(nullptr)
  5. ,_pointLight(nullptr)
  6. ,_spotLight(nullptr)
  7. {
  8. addSprite();//添加精灵
  9. addLights();//添加光源
  10. scheduleUpdate();//帧更新
  12. //设置摄像机位置
  13. autos=Director::getInstance()->getWinSize();
  14. //参数1:透视相机的视野，通常在40-60度范围
  15. //参数2:相机的长宽比，通常视窗的宽度除以视窗的高度
  16. //参数3:近点平面距离
  17. //参数4:原点平面距离
  18. autocamera=Camera::createPerspective(60,(GLfloat)s.width/s.height,1.0f,1000.0f);
  19. camera->setCameraFlag(CameraFlag::USER1);//设置相机Flag
  20. camera->setPosition3D(Vec3(0.0,100,100));//设置相机3D坐标
  21. //参数1:目标的中心位置，参数2:向上的向量
  22. camera->lookAt(Vec3(0.0,0.0,0.0),Vec3(0.0,1.0,0.0));
  23. addChild(camera);
  25. //添加相机转换的开光，Label控件
  26. TTFConfigttfConfig("fonts/arial.ttf",30);
  27. _ambientLightLabel=Label::createWithTTF(ttfConfig,"AmbientLightON");
  28. _ambientLightLabel->retain();
  29. automenuItem0=MenuItemLabel::create(_ambientLightLabel,CC_CALLBACK_1(LightTest::SwitchLight,this,LightType::AMBIENT));
  30. _directionalLightLabel=Label::createWithTTF(ttfConfig,"DirectionalLightOFF");
  31. _directionalLightLabel->retain();
  32. automenuItem1=MenuItemLabel::create(_directionalLightLabel,LightType::DIRECTIONAL));
  33. _pointLightLabel=Label::createWithTTF(ttfConfig,"PointLightOFF");
  34. _pointLightLabel->retain();
  35. automenuItem2=MenuItemLabel::create(_pointLightLabel,LightType::POINT));
  36. _spotLightLabel=Label::createWithTTF(ttfConfig,"SpotLightOFF");
  37. _spotLightLabel->retain();
  38. automenuItem3=MenuItemLabel::create(_spotLightLabel,LightType::SPOT));
  39. automenu=Menu::create(menuItem0,menuItem1,menuItem2,menuItem3,nullptr);
  40. menu->setPosition(Vec2::ZERO);
  41. menuItem0->setAnchorPoint(Vec2::ANCHOR_TOP_LEFT);
  42. menuItem0->setPosition(Vec2(VisibleRect::left().x,VisibleRect::top().y-50));
  43. menuItem1->setAnchorPoint(Vec2::ANCHOR_TOP_LEFT);
  44. menuItem1->setPosition(Vec2(VisibleRect::left().x,VisibleRect::top().y-100));
  45. menuItem2->setAnchorPoint(Vec2::ANCHOR_TOP_LEFT);
  46. menuItem2->setPosition(Vec2(VisibleRect::left().x,VisibleRect::top().y-150));
  47. menuItem3->setAnchorPoint(Vec2::ANCHOR_TOP_LEFT);
  48. menuItem3->setPosition(Vec2(VisibleRect::left().x,VisibleRect::top().y-200));
  49. addChild(menu);
  50. }
  51. //析构资源
  52. LightTest::~LightTest()
  53. {
  54. if(_spotLightLabel)
  55. _spotLightLabel->release();
  56. if(_pointLightLabel)
  57. _pointLightLabel->release();
  58. if(_directionalLightLabel)
  59. _directionalLightLabel->release();
  60. if(_spotLight)
  61. _spotLight->release();
  62. if(_pointLight)
  63. _pointLight->release();
  64. if(_directionalLight)
  65. _directionalLight->release();
  66. if(_ambientLight)
  67. _ambientLight->release();
  68. }
  69. voidLightTest::addSprite()
  70. //创建3D对象，c3b是二进制文件，通过FBX模型文件进行二次转换得到。
  71. //obj:FBX是一种通用导出格式，可通过maya和max导出，maya和max默认导出obj格式文件。
  72. //c3t:通过FBX模型文件转换后生成的Json文件，体积大载入慢，不提倡使用
  73. //c3b:二进制文件，数据内容与c3t一样，体积小，速度快，提倡使用
  74. //注意:.c3b文件的使用需和它对应的贴图拷贝到Resource目录下，否则，运行时找不到资源。
  75. std::stringfileName="orc.c3b";
  76. //创建3D精灵对象
  77. autosprite=Sprite3D::create(fileName);
  78. sprite->setRotation3D(Vec3(0.0,180.0,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> sprite->setPosition(Vec2(0.0,0.0));
  79. sprite->setScale(2.0);
  80. //创建3D精灵对象
  81. autosp=Sprite3D::create("axe.c3b");
  82. //通过骨骼名称获得连接点
  83. sprite->getAttachNode("Bip001RHand")->addChild(sp);
  84. //创建3D动画
  85. autoanimation=Animation3D::create(fileName);
  86. if(animation)
  87. autoanimate=Animate3D::create(animation);
  88. sprite->runAction(RepeatForever::create(animate));//3D精灵执行3D动画
  89. addChild(sprite);
  90. //设置精灵的Mask，该值与相机的flag进行&运算为真，则对相机可见
  91. sprite->setCameraMask(2);
  92. //同上
  93. std::stringfileName="sphere.c3b";
  94. sprite->setPosition(Vec2(30.0,248); margin:0px!important; padding:0px 3px 0px 10px!important"> sprite->setCameraMask(2);
  95. //同上
  96. std::stringfileName="sphere.c3b";
  97. autosprite=Sprite3D::create(fileName);
  98. sprite->setScale(0.5f);
  99. sprite->setPosition(Vec2(-50.0,248); margin:0px!important; padding:0px 3px 0px 10px!important"> sprite->setPosition(Vec2(-30.0,10.0));
  100. voidLightTest::addLights()
  101. autos=Director::getInstance()->getWinSize();
  102. //环境光
  103. _ambientLight=AmbientLight::create(Color3B(200,200,200));
  104. _ambientLight->retain();
  105. _ambientLight->setEnabled(true);//开启光源
  106. addChild(_ambientLight);
  107. _ambientLight->setCameraMask(2);//确保相机可见
  108. //方向光，参数1:光源方向.参数2:光源颜色
  109. _directionalLight=DirectionLight::create(Vec3(-1.0f,-1.0f,0.0f),Color3B(200,200));
  110. _directionalLight->retain();
  111. _directionalLight->setEnabled(false);//光源关闭
  112. addChild(_directionalLight);
  113. _directionalLight->setCameraMask(2);//确保相机可见
  114. //点光，参数1:光源的位置，参数2:光源的颜色。参数3:光源范围
  115. _pointLight=PointLight::create(Vec3(0.0f,0.0f,200),10000.0f);
  116. _pointLight->retain();
  117. _pointLight->setEnabled(//光源关闭
  118. addChild(_pointLight);
  119. _pointLight->setCameraMask(2);//聚光，参数1:方向。参数2:位置。参数3:颜色，参数4:内圆弧度。参数5:外圆弧度。参数6:光源范围
  120. _spotLight=SpotLight::create(Vec3(-1.0f,Vec3(0.0f,0.5,10000.0f);
  121. _spotLight->retain();
  122. _spotLight->setEnabled( addChild(_spotLight);
  123. _spotLight->setCameraMask(2); autotintto1=TintTo::create(4,255);
  124. autotintto2=TintTo::create(4,0);
  125. autotintto3=TintTo::create(4,0);
  126. autotintto4=TintTo::create(4,255);
  127. autoseq=Sequence::create(tintto1,tintto2,tintto3,tintto4,248); margin:0px!important; padding:0px 3px 0px 10px!important"> _ambientLight->runAction(RepeatForever::create(seq));//光源执行渐隐动作
  128. autotintto1=TintTo::create(4,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> autotintto2=TintTo::create(4,248); margin:0px!important; padding:0px 3px 0px 10px!important"> autotintto3=TintTo::create(4,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> autotintto4=TintTo::create(4,248); margin:0px!important; padding:0px 3px 0px 10px!important"> autoseq=Sequence::create(tintto1,nullptr);
  129. _directionalLight->runAction(RepeatForever::create(seq));//光源执行渐隐动作
  130. autoseq=Sequence::create(tintto2,tintto1,248); margin:0px!important; padding:0px 3px 0px 10px!important"> _pointLight->runAction(RepeatForever::create(seq)); autoseq=Sequence::create(tintto3,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> _spotLight->runAction(RepeatForever::create(seq));voidLightTest::update(floatdelta)
  131. staticfloatangleDelta=0.0;
  132. if(_directionalLight)
  133. _directionalLight->setRotation3D(Vec3(-45.0,-CC_RADIANS_TO_DEGREES(angleDelta),0.0f));//设置旋转角度，宏是弧度转化为角度
  134. //cosf与sinf：float版的cos和sin
  135. if(_pointLight)
  136. _pointLight->setPositionX(100.0f*cosf(angleDelta+2.0*delta));
  137. _pointLight->setPositionY(100.0f);
  138. _pointLight->setPositionZ(100.0f*sinf(angleDelta+2.0*delta));
  139. if(_spotLight)
  140. _spotLight->setPositionX(100.0f*cosf(angleDelta+4.0*delta));
  141. _spotLight->setPositionY(100.0f);
  142. _spotLight->setPositionZ(100.0f*sinf(angleDelta+4.0*delta));
  143. _spotLight->setDirection(-Vec3(cosf(angleDelta+4.0*delta),sinf(angleDelta+4.0*delta)));
  144. angleDelta+=delta;
  145. //update(delta);
  146. //光源开关
  147. voidLightTest::SwitchLight(Ref*sender,LightTypelightType)
  148. switch(lightType)
  149. caseLightType::AMBIENT:
  150. charstr[32];
  151. boolisON=!_ambientLight->isEnabled();
  152. sprintf(str,"AmbientLight%s",isON==true?"ON":"OFF");
  153. _ambientLight->setEnabled(isON);
  154. _ambientLightLabel->setString(str);
  155. break;
  156. caseLightType::DIRECTIONAL:
  157. boolisON=!_directionalLight->isEnabled();
  158. "DirectionalLight%s",108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> _directionalLight->setEnabled(isON);
  159. _directionalLightLabel->setString(str);
  160. caseLightType::POINT:
  161. boolisON=!_pointLight->isEnabled();
  162. "PointLight%s",108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> _pointLight->setEnabled(isON);
  163. _pointLightLabel->setString(str);
  164. caseLightType::SPOT:
  165. boolisON=!_spotLight->isEnabled();
  166. "SpotLight%s",108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> _spotLight->setEnabled(isON);
  167. _spotLightLabel->setString(str);
  168. default:
  169. break;
  170. }

3、使用

在HelloWorldScene.cpp中的createScene()中，创建LightTest的对象，加入Scene
原文链接：https://www.f2er.com/cocos2dx/346192.html

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