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55 lines
1.0 KiB
Go
Executable File
55 lines
1.0 KiB
Go
Executable File
package buffers
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import (
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"github.com/bloeys/nmage/logging"
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"github.com/go-gl/gl/v4.1-core/gl"
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)
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type VertexArray struct {
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Id uint32
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Vbos []VertexBuffer
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IndexBuffer IndexBuffer
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}
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func (va *VertexArray) Bind() {
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gl.BindVertexArray(va.Id)
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}
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func (va *VertexArray) UnBind() {
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gl.BindVertexArray(0)
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}
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func (va *VertexArray) AddVertexBuffer(vbo VertexBuffer) {
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// NOTE: VBOs are only bound at 'VertexAttribPointer' (and related) calls
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va.Bind()
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vbo.Bind()
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for i := 0; i < len(vbo.layout); i++ {
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l := &vbo.layout[i]
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gl.EnableVertexAttribArray(uint32(i))
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gl.VertexAttribPointerWithOffset(uint32(i), l.ElementType.CompCount(), l.ElementType.GLType(), false, vbo.Stride, uintptr(l.Offset))
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}
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}
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func (va *VertexArray) SetIndexBuffer(ib IndexBuffer) {
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va.Bind()
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ib.Bind()
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va.IndexBuffer = ib
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}
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func NewVertexArray() VertexArray {
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vao := VertexArray{}
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gl.GenVertexArrays(1, &vao.Id)
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if vao.Id == 0 {
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logging.ErrLog.Println("Failed to create OpenGL vertex array object")
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}
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return vao
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}
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