How do I render a.ive model with shader?
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mirr...@gmail.com
Nov 24, 2020, 10:16:40 PM11/24/20
to OpenSceneGraph Users
system Win10&
GTX1660 ,osg 3.6.4, osgearth 2.10.0
static const char* gl3_VertexShader = {
"#version " GLSL_VERSION_STR "\n"
"// gl3_VertexShader\n"
"#ifdef GL_ES\n"
" precision highp float;\n"
"#endif\n"
"in vec4 osg_Vertex;\n"
"in vec4 osg_MultiTexCoord0;\n"
"uniform mat4 osg_ModelViewProjectionMatrix;\n"
"out vec2 texCoord;\n"
"void main(void)\n"
"{\n"
" gl_Position = osg_ModelViewProjectionMatrix * osg_Vertex;\n"
" texCoord = osg_MultiTexCoord0.xy;\n"
"}\n"
};
static const char* gl3_FragmentShader = {
"#version " GLSL_VERSION_STR "\n"
"// gl3_FragmentShader\n"
"#ifdef GL_ES\n"
" precision highp float;\n"
"#endif\n"
"uniform sampler2D baseTexture;\n"
"in vec2 texCoord;\n"
"out vec4 color;\n"
"void main(void)\n"
"{\n"
" color = texture(baseTexture, texCoord);\n"
"}\n"
};
//
osg::ref_ptr<osg::Program> program = new osg::Program;
program->addShader(new osg::Shader(osg::Shader::VERTEX, gl2_VertexShader));
program->addShader(new osg::Shader(osg::Shader::FRAGMENT, gl2_FragmentShader));
stateSet->addUniform( new osg::Uniform( "
baseTexture ", 0) );
stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
osg::BlendFunc *fn = new osg::BlendFunc();
fn->setFunction(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::DST_ALPHA);
stateSet->setAttributeAndModes(fn, osg::StateAttribute::ON);
stateSet->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
stateSet->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
//the follow code is .ive model file data
Group {
UniqueID Group_0
DataVariance DYNAMIC
name "db"
nodeMask 0xffffffff
cullingActive TRUE
num_children 1
Group {
DataVariance DYNAMIC
name "g2"
nodeMask 0xffffffff
cullingActive TRUE
num_children 3
Group {
DataVariance DYNAMIC
name "dianqi"
nodeMask 0xffffffff
cullingActive TRUE
num_children 7
Group {
DataVariance DYNAMIC
name "ping_3"
nodeMask 0xffffffff
cullingActive TRUE
num_children 2
Geode {
DataVariance DYNAMIC
nodeMask 0xffffffff
cullingActive TRUE
num_drawables 2
Geometry {
DataVariance DYNAMIC
StateSet {
UniqueID StateSet_1
DataVariance STATIC
rendering_hint DEFAULT_BIN
renderBinMode INHERIT
GL_CULL_FACE ON
GL_LIGHTING OFF
CullFace {
UniqueID CullFace_2
DataVariance STATIC
mode BACK
}
textureUnit 0 {
GL_TEXTURE_2D ON
Texture2D {
DataVariance STATIC
file "F:/flt/VRProject/NewZZuCampus/CEEP/yazi.rgb"
wrap_s REPEAT
wrap_t REPEAT
wrap_r CLAMP
min_filter LINEAR_MIPMAP_LINEAR
mag_filter LINEAR
maxAnisotropy 1
borderColor 0 0 0 0
borderWidth 0
useHardwareMipMapGeneration TRUE
unRefImageDataAfterApply TRUE
internalFormatMode USE_IMAGE_DATA_FORMAT
resizeNonPowerOfTwo TRUE
shadowComparison FALSE
shadowCompareFunc GL_LEQUAL
shadowTextureMode GL_LUMINANCE
}
TexEnv {
UniqueID TexEnv_3
DataVariance STATIC
mode REPLACE
}
}
}
useDisplayList TRUE
useVertexBufferObjects FALSE
PrimitiveSets 1
{
DrawArrays QUADS 0 216
}
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270.399 -207.617
280.544 -204.814
289.962 -198.661
295.605 -190.972
298.331 -181.217
298.265 -170.528
228.628 105.395
226.671 107.999
224.148 108.143
125.632 104.379
122.252 102.352
120.754 98.1187
122.07 67.6939
138.313 58.859
143.616 -79.1053
143.72 -86.5751
142.96 -92.3393
140.641 -97.0636
134.292 -103
127.837 -105.604
120.198 -105.474
114.195 -103.684
108.6 -99.4802
104.523 -93.1804
102.903 -83.6699
99.9427 0.044184
99.3389 -0.0176301
}
}
}
OpenSceneGraph Users
Nov 25, 2020, 2:59:26 AM11/25/20
to OpenSceneGraph Users
You can't expect people to help you when you don't explain the problem you are seeing. A title, a screenshot and some shader code is not in any way sufficient. Far better to take a step back and explain what you are doing, what you have got working, what doesn't work.
mirr...@gmail.com
Nov 27, 2020, 10:14:29 PM11/27/20
to OpenSceneGraph Users
I'm new to this. To be honest, I don't understand.
I want to know how to render a complex OBJ model with Shader.Do you want to render the children of the OBJ model separately?
mirr...@gmail.com
Dec 9, 2020, 8:56:57 PM12/9/20
to OpenSceneGraph Users
i find this setUseVertexAttributeAliasing must be set in Osg when using higher versions of Shader. Otherwise it won't work
gc->getState()->setUseVertexAttributeAliasing(true);
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