buffers

Documentation

Index

• type BufUsage
  • func (b BufUsage) ToGL() uint32
• type Element
• type ElementType
  • func (dt ElementType) CompCount() int32
  • func (dt ElementType) CompSize() int32
  • func (dt ElementType) GLType() uint32
  • func (dt ElementType) Size() int32
• type IndexBuffer
  • func NewIndexBuffer() IndexBuffer
  • func (ib *IndexBuffer) Bind()
  • func (ib *IndexBuffer) SetData(values []uint32)
  • func (ib *IndexBuffer) UnBind()
• type VertexArray
  • func NewVertexArray() VertexArray
  • func (va *VertexArray) AddVertexBuffer(vbo VertexBuffer)
  • func (va *VertexArray) Bind()
  • func (va *VertexArray) SetIndexBuffer(ib IndexBuffer)
  • func (va *VertexArray) UnBind()
• type VertexBuffer
  • func NewVertexBuffer(layout ...Element) VertexBuffer
  • func (vb *VertexBuffer) Bind()
  • func (vb *VertexBuffer) GetLayout() []Element
  • func (vb *VertexBuffer) SetData(values []float32, usage BufUsage)
  • func (vb *VertexBuffer) SetLayout(layout ...Element)
  • func (vb *VertexBuffer) UnBind()

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 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)

type IndexBuffer

type IndexBuffer struct {
	Id uint32
	// IndexBufCount is the number of elements in the index buffer. Updated in IndexBuffer.SetData
	IndexBufCount int32
}

func NewIndexBuffer

func NewIndexBuffer() IndexBuffer

func (*IndexBuffer) Bind

func (ib *IndexBuffer) Bind()

func (*IndexBuffer) SetData

func (ib *IndexBuffer) SetData(values []uint32)

func (*IndexBuffer) UnBind

func (ib *IndexBuffer) UnBind()

type VertexArray

type VertexArray struct {
	Id          uint32
	Vbos        []VertexBuffer
	IndexBuffer IndexBuffer
}

func NewVertexArray

func NewVertexArray() VertexArray

func (*VertexArray) AddVertexBuffer

func (va *VertexArray) AddVertexBuffer(vbo VertexBuffer)

func (*VertexArray) Bind

func (va *VertexArray) Bind()

func (*VertexArray) SetIndexBuffer

func (va *VertexArray) SetIndexBuffer(ib IndexBuffer)

func (*VertexArray) UnBind

func (va *VertexArray) UnBind()

type VertexBuffer

type VertexBuffer struct {
	Id     uint32
	Stride int32
	// contains filtered or unexported fields
}

func NewVertexBuffer

func NewVertexBuffer(layout ...Element) VertexBuffer

func (*VertexBuffer) Bind

func (vb *VertexBuffer) Bind()

func (*VertexBuffer) GetLayout

func (vb *VertexBuffer) GetLayout() []Element

func (*VertexBuffer) SetData

func (vb *VertexBuffer) SetData(values []float32, usage BufUsage)

func (*VertexBuffer) SetLayout

func (vb *VertexBuffer) SetLayout(layout ...Element)

func (*VertexBuffer) UnBind

func (vb *VertexBuffer) UnBind()