C++ (Cpp) vertex_attribute_enable示例

示例#1

文件： vertex-buffer.c 项目： hurry07/opengl_android

// ----------------------------------------------------------------------------
// bind all kinds of buffer
void
vertex_buffer_render_setup ( vertex_buffer_t *self, GLenum mode )
{
    size_t i;

    if( self->state != CLEAN )
    {
        vertex_buffer_upload( self );
        self->state = CLEAN;
    }
    
    glBindBuffer( GL_ARRAY_BUFFER, self->vertices_id );// bind attribute as a whole

    for( i=0; i<MAX_VERTEX_ATTRIBUTE; ++i )
    {
        vertex_attribute_t *attribute = self->attributes[i];
        if ( attribute == 0 )
        {
            continue;
        }
        else
        {
            vertex_attribute_enable( attribute );
        }
    }

    if( self->indices->size )
    {
        glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, self->indices_id );// index?
    }
    self->mode = mode;
}

示例#2

文件： vertex-buffer.c 项目： dvangestel/freetype-gl

// ----------------------------------------------------------------------------
void
vertex_buffer_render_setup ( vertex_buffer_t *self, GLenum mode )
{
    size_t i;

#ifdef FREETYPE_GL_USE_VAO
    // Unbind so no existing VAO-state is overwritten,
    // (e.g. the GL_ELEMENT_ARRAY_BUFFER-binding).
    glBindVertexArray( 0 );
#endif

    if( self->state != CLEAN )
    {
        vertex_buffer_upload( self );
        self->state = CLEAN;
    }

#ifdef FREETYPE_GL_USE_VAO
    if( self->VAO_id == 0 )
    {
        // Generate and set up VAO

        glGenVertexArrays( 1, &self->VAO_id );
        glBindVertexArray( self->VAO_id );

        glBindBuffer( GL_ARRAY_BUFFER, self->vertices_id );

        for( i=0; i<MAX_VERTEX_ATTRIBUTE; ++i )
        {
            vertex_attribute_t *attribute = self->attributes[i];
            if( attribute == 0 )
            {
                continue;
            }
            else
            {
                vertex_attribute_enable( attribute );
            }
        }

        glBindBuffer( GL_ARRAY_BUFFER, 0 );

        if( self->indices->size )
        {
            glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, self->indices_id );
        }
    }

    // Bind VAO for drawing
    glBindVertexArray( self->VAO_id );
#else

    glBindBuffer( GL_ARRAY_BUFFER, self->vertices_id );

    for( i=0; i<MAX_VERTEX_ATTRIBUTE; ++i )
    {
        vertex_attribute_t *attribute = self->attributes[i];
        if ( attribute == 0 )
        {
            continue;
        }
        else
        {
            vertex_attribute_enable( attribute );
        }
    }

    if( self->indices->size )
    {
        glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, self->indices_id );
    }
#endif

    self->mode = mode;
}