func (shape *StaticShape) Draw(shader Shader, camera Camera) {
gl.BindBuffer(gl.ARRAY_BUFFER, shape.VBO)
stride := shape.Stride()
gl.EnableVertexAttribArray(shader.Attrib("vertCoord"))
gl.VertexAttribPointer(shader.Attrib("vertCoord"), vertexDim, gl.FLOAT, false, stride, 0)
if len(shape.normals) > 0 {
gl.EnableVertexAttribArray(shader.Attrib("vertNormal"))
gl.VertexAttribPointer(shader.Attrib("vertNormal"), normalDim, gl.FLOAT, false, stride, vertexDim*vecSize)
}
// TODO: texture
if len(shape.indices) > 0 {
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, shape.IBO)
gl.DrawElements(gl.TRIANGLES, len(shape.indices), gl.UNSIGNED_BYTE, 0)
} else {
gl.DrawArrays(gl.TRIANGLES, 0, shape.Len())
}
gl.DisableVertexAttribArray(shader.Attrib("vertCoord"))
if len(shape.normals) > 0 {
gl.DisableVertexAttribArray(shader.Attrib("vertNormal"))
}
// TODO: texture
}
func (shape *Skybox) Draw(camera Camera) {
shader := shape.shader
gl.DepthFunc(gl.LEQUAL)
gl.DepthMask(false)
projection, view := camera.Projection(), camera.View().Mat3().Mat4()
gl.UniformMatrix4fv(shader.Uniform("projection"), projection[:])
gl.UniformMatrix4fv(shader.Uniform("view"), view[:])
gl.BindTexture(gl.TEXTURE_CUBE_MAP, shape.Texture)
gl.BindBuffer(gl.ARRAY_BUFFER, shape.VBO)
gl.EnableVertexAttribArray(shader.Attrib("vertCoord"))
gl.VertexAttribPointer(shader.Attrib("vertCoord"), vertexDim, gl.FLOAT, false, shape.Stride(), 0)
gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, shape.IBO)
gl.DrawElements(gl.TRIANGLES, len(shape.indices), gl.UNSIGNED_BYTE, 0)
gl.DisableVertexAttribArray(shader.Attrib("vertCoord"))
gl.DepthMask(true)
gl.DepthFunc(gl.LESS)
}