buffers

Documentation

Index

• type BufUsage
  • func (b BufUsage) ToGL() uint32
• type Buffer
  • func NewBuffer(layout ...Element) Buffer
  • func (b *Buffer) Bind()
  • func (b *Buffer) GetLayout() []Element
  • func (b *Buffer) SetData(values []float32)
  • func (b *Buffer) SetIndexBufData(values []uint32)
  • func (b *Buffer) SetLayout(layout ...Element)
  • func (b *Buffer) UnBind()
• type Element
• type ElementType
  • func (dt ElementType) CompCount() int32
  • func (dt ElementType) CompSize() int32
  • func (dt ElementType) GLType() uint32
  • func (dt ElementType) Size() int32

Types

type BufUsage

type BufUsage int

const (
	//Buffer is set only once and used many times
	BufUsage_Static BufUsage = iota
	//Buffer is changed a lot and used many times
	BufUsage_Dynamic
	//Buffer is set only once and used by the GPU at most a few times
	BufUsage_Stream
)

func (BufUsage) ToGL

func (b BufUsage) ToGL() uint32

type Buffer

type Buffer struct {
	VAOID uint32
	//BufID is the ID of the VBO
	BufID uint32
	//IndexBufID is the ID of the index/element buffer
	IndexBufID    uint32
	IndexBufCount int32
	Stride        int32
	// contains filtered or unexported fields
}

func NewBuffer

func NewBuffer(layout ...Element) Buffer

func (*Buffer) Bind

func (b *Buffer) Bind()

func (*Buffer) GetLayout

func (b *Buffer) GetLayout() []Element

func (*Buffer) SetData

func (b *Buffer) SetData(values []float32)

func (*Buffer) SetIndexBufData

func (b *Buffer) SetIndexBufData(values []uint32)

func (*Buffer) SetLayout

func (b *Buffer) SetLayout(layout ...Element)

func (*Buffer) UnBind

func (b *Buffer) UnBind()

type Element

type Element struct {
	Offset int
	ElementType
}

Element represents an element that makes up a buffer (e.g. Vec3 at an offset of 12 bytes)

type ElementType

type ElementType int

ElementType is the type of an element thats makes up a buffer (e.g. Vec3)

const (
	DataTypeUnknown ElementType = iota
	DataTypeUint32
	DataTypeInt32
	DataTypeFloat32

	DataTypeVec2
	DataTypeVec3
	DataTypeVec4
)

func (ElementType) CompCount

func (dt ElementType) CompCount() int32

CompCount returns the number of components in the element (e.g. for Vec2 its 2)

func (ElementType) CompSize

func (dt ElementType) CompSize() int32

CompSize returns the size in bytes for one component of the type (e.g. for Vec2 its 4)

func (ElementType) GLType

func (dt ElementType) GLType() uint32

func (ElementType) Size

func (dt ElementType) Size() int32

Size returns the total size in bytes (e.g. for vec3 its 3*4=12 bytes)