// Draw actually renders the shape on the surface.
func (box *Box) Draw() {
box.program.Use()
gl.VertexAttribPointer(box.posId, 2, gl.FLOAT, false, 0, &box.vertices[0])
gl.EnableVertexAttribArray(box.posId)
gl.VertexAttribPointer(box.colorId, 4, gl.FLOAT, false, 0, &box.vColor[0])
gl.EnableVertexAttribArray(box.colorId)
gl.UniformMatrix4fv(int32(box.modelMatrixId), 1, false, (*float32)(&box.modelMatrix[0]))
gl.UniformMatrix4fv(int32(box.projMatrixId), 1, false, (*float32)(&box.projMatrix[0]))
gl.UniformMatrix4fv(int32(box.viewMatrixId), 1, false, (*float32)(&box.viewMatrix[0]))
gl.Uniform1f(int32(box.texRatioId), 0.0)
// Texture
if len(box.texCoords) > 0 {
gl.Uniform1f(int32(box.texRatioId), 1.0)
gl.VertexAttribPointer(box.texInId, 2, gl.FLOAT, false, 0, &box.texCoords[0])
gl.EnableVertexAttribArray(box.texInId)
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, box.texBuffer)
gl.Uniform1i(int32(box.textureId), 0)
}
gl.DrawArrays(gl.TRIANGLE_STRIP, 0, 4)
gl.Flush()
gl.Finish()
}
func (renderState *renderState) draw() {
gl.Clear(gl.COLOR_BUFFER_BIT)
gl.VertexAttribPointer(attrPos, 4, gl.FLOAT, false, 6*4, &vertices[0])
gl.VertexAttribPointer(attrTexIn, 2, gl.FLOAT, false, 6*4, &vertices[4])
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, textureBuffer)
gl.Uniform1i(int32(unifTexture), 0)
gl.DrawArrays(gl.TRIANGLE_FAN, 0, 4)
gl.Flush()
gl.Finish()
}
func (c *Cube) Draw() {
c.Program.Use()
gl.VertexAttribPointer(c.attrPos, 4, gl.FLOAT, false, SizeOfFloat*6, &c.Vertices[0])
gl.VertexAttribPointer(c.attrTexIn, 2, gl.FLOAT, false, 6*SizeOfFloat, &c.Vertices[4])
gl.UniformMatrix4fv(int32(c.uniformModel), 1, false, (*float32)(&c.model[0]))
gl.UniformMatrix4fv(int32(c.uniformProjectionView), 1, false, (*float32)(&c.projectionView[0]))
gl.ActiveTexture(gl.TEXTURE0)
gl.BindTexture(gl.TEXTURE_2D, c.textureBuffer)
gl.Uniform1i(int32(c.uniformTexture), 0)
gl.DrawElements(gl.TRIANGLES, gl.Sizei(len(c.indices)), gl.UNSIGNED_BYTE, gl.Void(&c.indices[0]))
gl.Flush()
gl.Finish()
}