osg.Texture3D

osg.Texture3D是一个用于加载和处理3D纹理的类。它是OpenSceneGraph中的一部分。

使用方式

创建纹理对象

osg::Texture3D* texture3D = new osg::Texture3D;

初始化纹理数据

int width = 256;
int height = 256;
int depth = 256;

osg::ref_ptr<osg::Image> image = new osg::Image;
image->allocateImage(width, height, depth, GL_RGBA, GL_UNSIGNED_BYTE);
memset(image->data(), 255, width * height * depth);

texture3D->setImage(image.get());

设置纹理参数

texture3D->setFilter(osg::Texture3D::MIN_FILTER, osg::Texture3D::LINEAR);
texture3D->setFilter(osg::Texture3D::MAG_FILTER, osg::Texture3D::LINEAR);
texture3D->setWrap(osg::Texture3D::WRAP_S, osg::Texture3D::REPEAT);
texture3D->setWrap(osg::Texture3D::WRAP_T, osg::Texture3D::REPEAT);
texture3D->setWrap(osg::Texture3D::WRAP_R, osg::Texture3D::REPEAT);

应用纹理

osg::ref_ptr<osg::Geode> geode = new osg::Geode;
osg::ref_ptr<osg::Geometry> geom = osg::createTexturedQuadGeometry(osg::Vec3(0, 0, 0), osg::Vec3(10, 0, 0), osg::Vec3(0, 0, 10), 0, 0, 10, 10);
geode->addDrawable(geom.get());

osg::ref_ptr<osg::StateSet> ss = geode->getOrCreateStateSet();
ss->setTextureAttributeAndModes(0, texture3D.get());

方法列表

构造函数

Texture3D()
Texture3D(const Texture3D& texture, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY)

获取纹理类型

virtual GLenum getTextureTarget() const { return GL_TEXTURE_3D; }

设置数据

void setImage(osg::Image* image);
void setImage(unsigned int face, osg::Image* image);
void setSubImage(int xOffset, int yOffset, int zOffset, osg::Image* image);

设置边框颜色

void setBorderColor(const osg::Vec4& color);
void setBorderColor(const float r, const float g, const float b, const float a);

设置边框宽度

void setBorderWidth(const float width);

设置纹理过滤

void setFilter(const GLenum min_filter, const GLenum mag_filter);

设置纹理环绕

void setWrap(const GLenum s_wrap, const GLenum t_wrap, const GLenum r_wrap);

获取纹理单元编号

virtual unsigned int getTextureUnit() const;

序列化

virtual bool read(osg::Object::ReadBuffer& readBuffer);
virtual bool write(osg::Object::WriteBuffer& writeBuffer) const;