Osg-OsgShader着色器(Qt5.14.2+osgE3.6.5+win10)-No19-OsgShader
作者：互联网
.pro
1 QT += core gui widgets
2 TARGET = TestOsgQt
3 TEMPLATE = app
4 DEFINES += QT_DEPRECATED_WARNINGS
5 CONFIG += c++11
6
7 QMAKE_CXXFLAGS_RELEASE = $$QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO
8 QMAKE_LFLAGS_RELEASE = $$QMAKE_LFLAGS_RELEASE_WITH_DEBUGINFO
9
10 SOURCES += \
11 main.cpp
12
13 HEADERS +=
14
15 OsgDir = D:\\Gitee\\osg365R
16 CONFIG(release, debug|release) {
17 LIBS += -L$${OsgDir}/lib/ -losgDB -losgViewer -lOpenThreads -losgAnimation -losg \
18 -losgEarth -losgEarthAnnotation -losgEarthFeatures -losgEarthSymbology -losgEarthUtil \
19 -losgQOpenGL -losgUtil -losgText -losgTerrain -losgSim \
20 -losgShadow -losgParticle -losgManipulator -losgGA -losgFX \
21 -losgWidget
22 } else {
23 LIBS += -L$${OsgDir}/debug/lib/ -losgDBd -losgViewerd -lOpenThreadsd -losgAnimationd -losgd \
24 -losgEarthd -losgEarthAnnotationd -losgEarthFeaturesd -losgEarthSymbologyd -losgEarthUtild \
25 -losgQOpenGLd -losgUtild -losgTextd -losgTerraind -losgSimd \
26 -losgShadowd -losgParticled -losgManipulatord -losgGAd -losgFXd \
27 }
28
29
30 INCLUDEPATH += $${OsgDir}/include
31 DEPENDPATH += $${OsgDir}/include
View Code
main.cpp
1 // 原文
2 // https://www.baidu.com/link?url=gbmmOlk8c213ybwxNnnYTwLqvK3vZajPVLLSImrBOG1ovEN1eYnkxoJUkMidHz7efRheoF9g_XQM_Nx5r70hI_&wd=&eqid=b5d5f9fc00012dcf0000000362ce309e
3
4 #include <osg/Node>
5 #include <osg/Geometry>
6 #include <osg/Notify>
7 #include <osg/MatrixTransform>
8 #include <osg/Texture2D>
9 #include <osg/DrawPixels>
10 #include <osg/PolygonOffset>
11 #include <osg/Geode>
12
13 #include <osgDB/Registry>
14 #include <osgDB/ReadFile>
15
16 #include <osgText/Text>
17
18 #include <osgViewer/Viewer>
19
20 #include <osg/ShapeDrawable>
21
22 #ifdef _DEBUG
23 #pragma comment(lib,"osgd.lib")
24 #pragma comment(lib,"osgDBd.lib")
25 #pragma comment(lib,"osgTextd.lib")
26 #pragma comment(lib,"osgViewerd.lib")
27 #endif
28
29 class TextureCoordUpdateCallback : public osg::NodeCallback
30 {
31 public:
32
33 TextureCoordUpdateCallback(double delay = 1.0) :
34 _delay(delay),
35 _prevTime(0.0)
36 {
37 }
38
39 virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
40 {
41 if (nv->getFrameStamp())
42 {
43 double currTime = nv->getFrameStamp()->getSimulationTime();
44 if (currTime - _prevTime > _delay)
45 {
46 osg::Geode* geode = node->asGeode();
47 osg::Geometry* geom = geode->getDrawable(0)->asGeometry();
48 // 获取纹理坐标数组
49 osg::Array* tmp = geom->getTexCoordArray(0);
50 osg::Vec2Array* coorArray = (osg::Vec2Array*) tmp;
51 auto it = coorArray->begin();
52 for (; it < coorArray->end(); it++)
53 {
54 // 动起来
55 it->x() += 0.001;
56 }
57 // 更新纹理坐标数组
58 geom->setTexCoordArray(0, coorArray);
59
60 // record time
61 _prevTime = currTime;
62 }
63 }
64 }
65
66
67 protected:
68 double _delay;
69 double _prevTime;
70
71 };
72
73
74 osg::Node* createPyramidModel()
75 {
76 // create the root node which will hold the model.
77 osg::Group* root = new osg::Group();
78
79 // turn off lighting
80 root->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
81
82 osg::Geode* pyramidGeode = new osg::Geode();
83 osg::Geometry* pyramidGeometry = new osg::Geometry();
84 pyramidGeode->setUpdateCallback(new TextureCoordUpdateCallback(0.01));
85 pyramidGeode->setDataVariance(osg::Object::DYNAMIC);
86 pyramidGeode->addDrawable(pyramidGeometry);
87 root->addChild(pyramidGeode);
88
89 osg::Vec3Array* pyramidVertices = new osg::Vec3Array;
90 pyramidVertices->push_back(osg::Vec3(0, 0, 0)); // 左前
91 pyramidVertices->push_back(osg::Vec3(10, 0, 0)); // 右前
92 pyramidVertices->push_back(osg::Vec3(10, 10, 0)); // 右后
93 pyramidVertices->push_back(osg::Vec3(0, 10, 0)); // 左后
94 pyramidVertices->push_back(osg::Vec3(5, 5, 10)); // 塔尖
95 pyramidGeometry->setVertexArray(pyramidVertices);
96 osg::DrawElementsUInt* pyramidBase = new osg::DrawElementsUInt(osg::PrimitiveSet::QUADS, 0);
97 pyramidBase->push_back(3);
98 pyramidBase->push_back(2);
99 pyramidBase->push_back(1);
100 pyramidBase->push_back(0);
101 pyramidGeometry->addPrimitiveSet(pyramidBase);
102 osg::DrawElementsUInt* pyramidFaceOne = new osg::DrawElementsUInt(osg::PrimitiveSet::TRIANGLES, 0);
103 pyramidFaceOne->push_back(0);
104 pyramidFaceOne->push_back(1);
105 pyramidFaceOne->push_back(4);
106 pyramidGeometry->addPrimitiveSet(pyramidFaceOne);
107 osg::DrawElementsUInt* pyramidFaceTwo = new osg::DrawElementsUInt(osg::PrimitiveSet::TRIANGLES, 0);
108 pyramidFaceTwo->push_back(1);
109 pyramidFaceTwo->push_back(2);
110 pyramidFaceTwo->push_back(4);
111 pyramidGeometry->addPrimitiveSet(pyramidFaceTwo);
112 osg::DrawElementsUInt* pyramidFaceThree = new osg::DrawElementsUInt(osg::PrimitiveSet::TRIANGLES, 0);
113 pyramidFaceThree->push_back(2);
114 pyramidFaceThree->push_back(3);
115 pyramidFaceThree->push_back(4);
116 pyramidGeometry->addPrimitiveSet(pyramidFaceThree);
117 osg::DrawElementsUInt* pyramidFaceFour = new osg::DrawElementsUInt(osg::PrimitiveSet::TRIANGLES, 0);
118 pyramidFaceFour->push_back(3);
119 pyramidFaceFour->push_back(0);
120 pyramidFaceFour->push_back(4);
121 pyramidGeometry->addPrimitiveSet(pyramidFaceFour);
122
123 osg::Vec4Array* colors = new osg::Vec4Array;
124 colors->push_back(osg::Vec4(1.0f, 0.0f, 0.0f, 1.0f)); //红色
125 colors->push_back(osg::Vec4(0.0f, 1.0f, 0.0f, 1.0f)); //绿色
126 colors->push_back(osg::Vec4(0.0f, 0.0f, 1.0f, 1.0f)); //蓝色
127 colors->push_back(osg::Vec4(1.0f, 1.0f, 1.0f, 1.0f)); //白色
128 pyramidGeometry->setColorArray(colors);
129 pyramidGeometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
130
131 osg::Vec3Array* normals = new osg::Vec3Array(1);
132 (*normals)[0].set(0.0f, -1.0f, 0.0f);
133 pyramidGeometry->setNormalArray(normals, osg::Array::BIND_OVERALL);
134
135 osg::Vec2Array* texcoords = new osg::Vec2Array(5);
136 (*texcoords)[0].set(0.00f, 0.0f);
137 (*texcoords)[1].set(0.25f, 0.0f);
138 (*texcoords)[2].set(0.50f, 0.0f);
139 (*texcoords)[3].set(0.75f, 0.0f);
140 (*texcoords)[4].set(0.50f, 1.0f);
141 pyramidGeometry->setTexCoordArray(0, texcoords);
142
143 // set up the texture state.
144 osg::Texture2D* texture = new osg::Texture2D;
145 texture->setDataVariance(osg::Object::DYNAMIC); // protect from being optimized away as static state.
146 texture->setFilter(osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR);
147 texture->setFilter(osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR);
148 texture->setWrap(osg::Texture2D::WRAP_S, osg::Texture2D::REPEAT);
149 texture->setWrap(osg::Texture2D::WRAP_T, osg::Texture2D::REPEAT);
150 texture->setImage(osgDB::readImageFile("D:/Gitee/OsgTestQt/src/No19-OsgShader/road.png"));
151 osg::StateSet* stateset = pyramidGeometry->getOrCreateStateSet();
152 stateset->setTextureAttributeAndModes(0, texture, osg::StateAttribute::ON);
153
154 return root;
155 }
156
157 static const char * fragShader = {
158 "varying vec4 color;\n"
159 "uniform sampler2D baseTex;\n"
160 "uniform int osg_FrameNumber;\n"//当前OSG程序运行的帧数；
161 "uniform float osg_FrameTime;\n"//当前OSG程序的运行总时间；
162 "uniform float osg_DeltaFrameTime;\n"//当前OSG程序运行每帧的间隔时间；
163 "uniform mat4 osg_ViewMatrix;\n"//当前OSG摄像机的观察矩阵；
164 "uniform mat4 osg_ViewMatrixInverse;\n"// 当前OSG摄像机观察矩阵的逆矩阵。
165 "void main(void){\n"
166 "vec2 coord = gl_TexCoord[0].xy+vec2(0,osg_FrameTime*0.8);"
167 " gl_FragColor = texture2D(baseTex, coord);\n"
168 "}\n"
169 };
170 osg::Node* createCone()
171 {
172 osg::ref_ptr<osg::Geode> geode = new osg::Geode;
173 osg::ref_ptr<osg::Cone> cone = new osg::Cone(osg::Vec3(0, 0, 0), 1.0f, 5);
174 osg::ref_ptr<osg::ShapeDrawable> shapeDrawable = new osg::ShapeDrawable(cone.get());
175 geode->addDrawable(shapeDrawable.get());
176
177 // set up the texture state.
178 osg::Texture2D* texture = new osg::Texture2D;
179 //texture->setDataVariance(osg::Object::DYNAMIC); // protect from being optimized away as static state.
180 texture->setFilter(osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR);
181 texture->setFilter(osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR);
182 texture->setWrap(osg::Texture2D::WRAP_S, osg::Texture2D::REPEAT);
183 texture->setWrap(osg::Texture2D::WRAP_T, osg::Texture2D::REPEAT);
184 texture->setImage(osgDB::readImageFile("D:/Gitee/OsgTestQt/src/No19-OsgShader/J20.jpg"));
185
186 osg::StateSet* stateset = shapeDrawable->getOrCreateStateSet();
187 stateset->setTextureAttributeAndModes(0, texture, osg::StateAttribute::ON);
188 osg::Program * program = new osg::Program;
189 program->addShader(new osg::Shader(osg::Shader::FRAGMENT, fragShader));
190 stateset->addUniform(new osg::Uniform("baseTex", 0));
191 stateset->setAttributeAndModes(program, osg::StateAttribute::ON);
192
193 return geode.release();
194 }
195 int main(int, char **)
196 {
197 // construct the viewer.
198 osgViewer::Viewer viewer;
199
200 // add model to viewer.
201 //viewer.setSceneData(createPyramidModel());
202 viewer.setSceneData(createCone());
203 viewer.setUpViewInWindow(200, 200, 800, 600, 0);
204
205 return viewer.run();
206 }
View Code
搜索
复制
<iframe></iframe>标签：Qt5.14,No19,back,texture,Texture2D,push,new,osg,OsgShader 来源： https://www.cnblogs.com/FKdelphi/p/16473509.html