nCine::Geometry class

#include <nCine/Graphics/Geometry.h>

Constructors, destructors, conversion operators

Geometry()

Default constructor.

~Geometry()

Public functions

auto primitiveType() const -> GLenum

Returns the primitive type (GL_TRIANGLES, GL_TRIANGLE_STRIP, ...)

auto firstVertex() const -> GLint

Returns the index of the first vertex to draw.

auto numVertices() const -> GLsizei

Returns the number of vertices.

auto numElementsPerVertex() const -> unsigned int

Returns the number of float elements that composes the vertex format.

void setDrawParameters(GLenum primitiveType, GLint firstVertex, GLsizei numVertices)

Sets all three drawing parameters.

void setPrimitiveType(GLenum primitiveType)

Sets the primitive type (GL_TRIANGLES, GL_TRIANGLE_STRIP, ...)

void setFirstVertex(GLint firstVertex)

Sets the index number of the first vertex to draw.

void setNumVertices(GLsizei numVertices)

Sets the number of vertices.

void setNumElementsPerVertex(unsigned int numElements)

Sets the number of float elements that composes the vertex format.

void createCustomVbo(unsigned int numFloats, GLenum usage)

Creates a custom VBO that is unique to this Geometry object.

auto acquireVertexPointer(unsigned int numFloats, unsigned int numFloatsAlignment) -> GLfloat*

Retrieves a pointer that can be used to write vertex data from a custom VBO owned by this object.

auto acquireVertexPointer(unsigned int numFloats) -> GLfloat*

Retrieves a pointer that can be used to write vertex data from a custom VBO owned by this object.

auto acquireVertexPointer() -> GLfloat*

Retrieves a pointer that can be used to write vertex data from a VBO owned by the buffers manager.

void releaseVertexPointer()

Releases the pointer used to write vertex data.

auto hostVertexPointer() const -> const float*

Returns a pointer into host memory containing vertex data to be copied into a VBO.

void setHostVertexPointer(const float* vertexPointer)

Sets a pointer into host memory containing vertex data to be copied into a VBO.

void shareVbo(const Geometry* geometry)

Shares the VBO of another Geometry object.

auto numIndices() const -> unsigned int

Returns the number of indices used to render the geometry.

void setFirstIndex(GLushort firstIndex)

Sets the index number of the first index to draw.

void setNumIndices(unsigned int numIndices)

Sets the number of indices used to render the geometry.

void createCustomIbo(unsigned int numIndices, GLenum usage)

Creates a custom IBO that is unique to this Geometry object.

auto acquireIndexPointer(unsigned int numIndices) -> GLushort*

Retrieves a pointer that can be used to write index data from a custom IBO owned by this object.

auto acquireIndexPointer() -> GLushort*

Retrieves a pointer that can be used to write index data from a IBO owned by the buffers manager.

void releaseIndexPointer()

Releases the pointer used to write index data.

auto hostIndexPointer() const -> const GLushort*

Returns a pointer into host memory containing index data to be copied into a IBO.

void setHostIndexPointer(const GLushort* indexPointer)

Sets a pointer into host memory containing index data to be copied into a IBO.

void shareIbo(const Geometry* geometry)

Shares the IBO of another Geometry object.

Function documentation