// Draw draws the Sprite object.
func (sprite *Sprite) Draw(frame int) error {
gl.BindBuffer(gl.ARRAY_BUFFER, sprite.shape.vertexBuffer)
gl.VertexAttribPointer(gl.Uint(0), 2, gl.FLOAT, gl.FALSE, 0, gl.Offset(nil, 0))
gl.BindAttribLocation(paunchEffect.program, gl.Uint(0), gl.GLString("position"))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
if sprite.texcoordBuffer != 0 {
gl.ActiveTexture(gl.TEXTURE0)
gl.BindBuffer(gl.ARRAY_BUFFER, sprite.texcoordBuffer)
gl.VertexAttribPointer(gl.Uint(1), 2, gl.FLOAT, gl.FALSE, 0, gl.Offset(nil, 0))
gl.BindAttribLocation(paunchEffect.program, gl.Uint(0), gl.GLString("texcoord"))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.BindTexture(gl.TEXTURE_2D, sprite.texture[frame])
gl.EnableVertexAttribArray(gl.Uint(1))
}
gl.EnableVertexAttribArray(gl.Uint(0))
gl.DrawArrays(gl.TRIANGLES, 0, gl.Sizei(sprite.shape.size))
gl.DisableVertexAttribArray(gl.Uint(0))
gl.DisableVertexAttribArray(gl.Uint(1))
gl.BindTexture(gl.TEXTURE_2D, 0)
return checkForErrors()
}
// Draw draws the Shape object.
func (shape *Shape) Draw() error {
gl.BindBuffer(gl.ARRAY_BUFFER, shape.vertexBuffer)
vertexAttribLoc := gl.GetAttribLocation(paunchEffect.program, gl.GLString("position"))
gl.VertexAttribPointer(gl.Uint(vertexAttribLoc), 2, gl.FLOAT, gl.FALSE, 0, gl.Offset(nil, 0))
gl.BindBuffer(gl.ARRAY_BUFFER, 0)
gl.EnableVertexAttribArray(gl.Uint(vertexAttribLoc))
gl.DrawArrays(shape.mode, 0, gl.Sizei(shape.size/2))
gl.DisableVertexAttribArray(gl.Uint(vertexAttribLoc))
//gl.DisableVertexAttribArray(gl.Uint(1))
//gl.BindTexture(gl.TEXTURE_2D, 0)
return checkForErrors()
}