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Stellarium 0.12.3
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Base class for QGL-using vertex buffer backends based on separate attribute arrays. More...
#include <StelQGLArrayVertexBufferBackend.hpp>
Public Member Functions | |
virtual void | addVertex (const void *const vertexInPtr) |
Add a new vertex to the buffer. More... | |
virtual void | getVertex (const int index, void *const vertexOutPtr) const |
Get a vertex from the buffer. More... | |
virtual void | setVertex (const int index, const void *const vertexInPtr) |
Rewrite a vertex in the buffer. More... | |
virtual void | lock () |
Lock the buffer. Must be called before drawing. More... | |
virtual void | unlock () |
Unlock the buffer. Must be called to modify the buffer after drawing. More... | |
virtual void | clear () |
Clear the buffer, removing all vertices. More... | |
void | projectVertices (StelProjector *projector, class StelQGLIndexBuffer *indexBuffer) |
Use a StelProjector to project vertex positions. More... | |
int | length () const |
Get the number of vertices in the buffer. More... | |
PrimitiveType | getPrimitiveType () const |
Return graphics primitive type formed by the vertices of the buffer,. More... | |
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StelVertexBufferBackend (const QVector< StelVertexAttribute > &attributes) | |
Construct a StelVertexBufferBackend, specifying attributes of the vertex type. More... | |
virtual | ~StelVertexBufferBackend () |
Required to ensure that derived classes get properly deallocated. More... | |
void | validateVertexType (const int vertexSize) |
Assert that the user-specified (in StelVertexBuffer) vertex type is valid. More... | |
Protected Member Functions | |
StelQGLArrayVertexBufferBackend (const PrimitiveType type, const QVector< StelVertexAttribute > &attributes) | |
Construct a StelQGLArrayVertexBufferBackend. More... | |
Protected Attributes | |
bool | locked |
Is the vertex buffer locked (i.e. ready to draw?). More... | |
PrimitiveType | primitiveType |
Graphics primitive type formed by the vertices of this buffer. More... | |
int | vertexCount |
Number of vertices in the buffer. More... | |
int | vertexCapacity |
Number of vertices we have allocated space for. More... | |
void * | attributeBuffers [AttributeInterpretation_MAX] |
Buffers storing vertex attributes. More... | |
bool | usingProjectedPositions |
Are we using vertex positions projected by a StelProjector? More... | |
Vec3f * | projectedPositions |
Projected vertex positions to draw when we're projecting vertices with a StelProjector. More... | |
int | projectedPositionsCapacity |
Allocated capacity of the projectedPositions array. More... | |
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const Attributes | attributes |
Specifies layout of vertex attributes in the vertex type. More... | |
Base class for QGL-using vertex buffer backends based on separate attribute arrays.
Definition at line 33 of file StelQGLArrayVertexBufferBackend.hpp.
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protected |
Construct a StelQGLArrayVertexBufferBackend.
Initializes vertex attribute buffers.
type | Graphics primitive type stored in the buffer. |
attributes | Specifications of vertex attributes that will be stored in the buffer. |
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virtual |
Add a new vertex to the buffer.
StelVertexBuffer guarantees that when this is called, buffer is not locked and index is in range.
vertexInPtr | Pointer to the beginning of the vertex. Data members of the vertex must match vertex attributes of the buffer. |
Implements StelVertexBufferBackend.
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inlinevirtual |
Clear the buffer, removing all vertices.
The backend implementation might reuse previously allocated storage after clearing, so calling clear() might be more efficient than destroying a buffer and then constructing a new one.
Implements StelVertexBufferBackend.
Definition at line 57 of file StelQGLArrayVertexBufferBackend.hpp.
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inline |
Return graphics primitive type formed by the vertices of the buffer,.
Definition at line 81 of file StelQGLArrayVertexBufferBackend.hpp.
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virtual |
Get a vertex from the buffer.
StelVertexBuffer guarantees that when this is called, buffer is not locked and index is in range.
index | Index of the vertex to read. |
vertexOutPtr | Pointer to the beginning of the output vertex. Data members of the vertex must match vertex attributes of the buffer. |
Implements StelVertexBufferBackend.
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inline |
Get the number of vertices in the buffer.
Definition at line 75 of file StelQGLArrayVertexBufferBackend.hpp.
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inlinevirtual |
Lock the buffer. Must be called before drawing.
Implements StelVertexBufferBackend.
Definition at line 47 of file StelQGLArrayVertexBufferBackend.hpp.
void StelQGLArrayVertexBufferBackend::projectVertices | ( | StelProjector * | projector, |
class StelQGLIndexBuffer * | indexBuffer | ||
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Use a StelProjector to project vertex positions.
Can be called only immediately before drawing. The projected vertex positions are only used for one draw call - another one might use a different/modified projector or index buffer.
projector | Projector to project the vertices. |
indexBuffer | Index buffer specifying which vertices to project. If NULL, all vertices are projected. |
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inlinevirtual |
Rewrite a vertex in the buffer.
StelVertexBuffer guarantees that when this is called, buffer is not locked and index is in range.
index | Index of the vertex to set. |
vertexInPtr | Pointer to the beginning of the vertex that will rewrite the vertex in the buffer. Data members of the vertex must match vertex attributes of the buffer. |
Implements StelVertexBufferBackend.
Definition at line 42 of file StelQGLArrayVertexBufferBackend.hpp.
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inlinevirtual |
Unlock the buffer. Must be called to modify the buffer after drawing.
Implements StelVertexBufferBackend.
Definition at line 52 of file StelQGLArrayVertexBufferBackend.hpp.
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protected |
Buffers storing vertex attributes.
Attribute interpretation is an index specifying the buffer. Buffers not used by the vertex format are NULL.
Definition at line 103 of file StelQGLArrayVertexBufferBackend.hpp.
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protected |
Is the vertex buffer locked (i.e. ready to draw?).
Definition at line 88 of file StelQGLArrayVertexBufferBackend.hpp.
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protected |
Graphics primitive type formed by the vertices of this buffer.
Definition at line 91 of file StelQGLArrayVertexBufferBackend.hpp.
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protected |
Projected vertex positions to draw when we're projecting vertices with a StelProjector.
This replaces the buffer with Position interpretation during drawing when usingProjectedPositions is true. The positions are projected by projectVertices().
Definition at line 118 of file StelQGLArrayVertexBufferBackend.hpp.
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protected |
Allocated capacity of the projectedPositions array.
Definition at line 121 of file StelQGLArrayVertexBufferBackend.hpp.
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protected |
Are we using vertex positions projected by a StelProjector?
(Instead of just letting OpenGL handle the projection)
This is set to true by projectVertices() and back to false by the draw call immediately after. The projected positions can only be used for one draw call, as for another one the StelProjector might be different/modified.
Definition at line 112 of file StelQGLArrayVertexBufferBackend.hpp.
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protected |
Number of vertices we have allocated space for.
Definition at line 97 of file StelQGLArrayVertexBufferBackend.hpp.
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protected |
Number of vertices in the buffer.
Definition at line 94 of file StelQGLArrayVertexBufferBackend.hpp.