func (this *Image) VertexData() *Opengl.OpenGLVertexInfo {
v := Opengl.OpenGLVertexInfo{}
w := float32(this.Bounds().Dx())
h := float32(this.Bounds().Dy())
// first tri
idx := v.NewVertex(-0.5*w, -0.5*h, 1.0)
v.SetUV(idx, this.uvs[0], this.uvs[1])
v.SetAggregateId(idx, this.aggrId)
idx = v.NewVertex(0.5*w, -0.5*h, 1.0)
v.SetUV(idx, this.uvs[2], this.uvs[3])
v.SetAggregateId(idx, this.aggrId)
idx = v.NewVertex(-0.5*w, 0.5*h, 1.0)
v.SetUV(idx, this.uvs[6], this.uvs[7])
v.SetAggregateId(idx, this.aggrId)
// second tri
idx = v.NewVertex(-0.5*w, 0.5*h, 1.0)
v.SetUV(idx, this.uvs[6], this.uvs[7])
v.SetAggregateId(idx, this.aggrId)
idx = v.NewVertex(0.5*w, -0.5*h, 1.0)
v.SetUV(idx, this.uvs[2], this.uvs[3])
v.SetAggregateId(idx, this.aggrId)
idx = v.NewVertex(0.5*w, 0.5*h, 1.0)
v.SetUV(idx, this.uvs[4], this.uvs[5])
v.SetAggregateId(idx, this.aggrId)
return &v
}
