osg.MultiDrawArraysIndirect

osg.MultiDrawArraysIndirect是OpenSceneGraph的一个绘制命令，用于多次绘制不同的几何体元素。

定义

class MultiDrawArraysIndirect : public DrawArraysIndirectCommand

继承

• osg::Referenced
• osg::PrimitiveSet
• osg::DrawArraysIndirectCommand
• osg::MultiDrawArraysIndirect

构造函数

MultiDrawArraysIndirect(GLenum mode = osg::PrimitiveSet::TRIANGLES,
	const BufferObject *indexPointer = nullptr,
	const osg::Vec4i& indirect = osg::Vec4i())

其中，参数意义如下：

• mode：绘制模式
• indexPointer：索引指针
• indirect：绘制指令

成员函数

void draw(osg::State & state, bool useVertexBufferObjects = false) const override

绘制函数，用于在OpenGL中执行绘制命令。

示例代码

osg::ref_ptr<osg::MultiDrawArraysIndirect> mdraw = new osg::MultiDrawArraysIndirect();
mdraw->setCount(2);
mdraw->setFirst(0);
mdraw->addDrawArraysIndirectCommand(osg::DrawArraysIndirectCommand(GL_TRIANGLES, 0, 3, 0));
mdraw->addDrawArraysIndirectCommand(osg::DrawArraysIndirectCommand(GL_TRIANGLES, 3, 6, 0));

osg::ref_ptr<osg::Geometry> geom = new osg::Geometry();
geom->addPrimitiveSet(mdraw);

参考信息

osg.MultiDrawArraysIndirect