IR Scene simulation has been an important way to design and assess the IR sensor, and the key of simulation is the
generation of IR scene image. Based on OpenGL, the method of IR image generation is proposed. The geometry model
is constructed with professional CAD software, and the observer location is determined after scene transformation. The
full infrared model of space target is built based on infrared physics and heat transfer, which includes the radiation,
convection, conduction between different parts of the space target, and which also includes the radiation, convection of
environment. Radiance of space target is converted to gray value, and properties of scene are defined according to the
gray level. After a series of processing, dynamic IR images are generated with the technology of double buffering.