inviwo::TetraMeshBuffers Struct Reference

#include <tetrameshbuffers.h>

Public Member Functions
void	bind () const
void	unbind () const
void	upload (const TetraMesh &mesh)
void	upload (const std::vector< vec4 > &nodes, const std::vector< ivec4 > &nodeIds, const std::vector< ivec4 > &opposingFaces)

Public Attributes
BufferObject	nodesBuffer
BufferObject	nodeIdsBuffer
BufferObject	opposingFaceIdsBuffer

Detailed Description

This is an OpenGL representation of the data required for rendering tetrahedral meshes on the GPU using GLSL shaders. The data is stored in Shader Storage Buffers.

Member Function Documentation

bind()

void inviwo::TetraMeshBuffers::bind

(

)

const

Bind the Shader Storage Buffers and tie them to specific layout locations. They can then be accessed in the shader as follows:

struct VertexPosition {
    vec3 pos;
    float scalar;
};
 
layout(std430, binding=0) readonly buffer nodeBuffer {
  VertexPosition vertexPositions[];
};
layout(std430, binding=1) readonly buffer nodeIdsBuffer {
   ivec4 vertexIds[];
};
layout(std430, binding=2) readonly buffer opposingFaceIdsBuffer {
    ivec4 faceIds[];
};

See also

glBindBufferBase

unbind()

void inviwo::TetraMeshBuffers::unbind

(

)

const

Unbind the Shader Storage Buffer.

upload() [1/2]

void inviwo::TetraMeshBuffers::upload	(	const std::vector< vec4 > &	nodes,
		const std::vector< ivec4 > &	nodeIds,
		const std::vector< ivec4 > &	opposingFaces )

Update the buffer contents of the Shader Storage Buffers on the GPU.

See also

upload(const TetraMesh&)

upload() [2/2]

void inviwo::TetraMeshBuffers::upload

(

const TetraMesh &

mesh

)

Update the buffer contents of the Shader Storage Buffers on the GPU.

Member Data Documentation

nodeIdsBuffer

BufferObject inviwo::TetraMeshBuffers::nodeIdsBuffer

A list of node/vertex IDs for each tetrahedron (ivec4). The faces opposite of each node are implicitly encoded.

nodesBuffer

BufferObject inviwo::TetraMeshBuffers::nodesBuffer

The nodes buffer holds the 3D coordinates of each node along with its scalar value (vec4). The scalar is stored in the w component.

opposingFaceIdsBuffer

BufferObject inviwo::TetraMeshBuffers::opposingFaceIdsBuffer

The four IDs of the opposing half faces of a single tetrahedron are stored in an ivec4. The order matches the one of the nodeIds so that the corresponding node is the apex of the face. A negative index indicates a boundary face with no opposing half face.

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The documentation for this struct was generated from the following file:

• tetrameshbuffers.h