pt是用Go语言实现的pathtracer用于渲染各种3D模型图。
特征支持OBJ和STL支持纹理，凹凸贴图和法线贴图支持有符号距离场的光线行进支持从图像切片进行体积渲染支持各种材料特性支持可配置的景深支持迭代渲染支持自适应采样和萤火虫减少使用KD树加速射线相交测试并行使用所有CPU内核100％纯净的Go，除了标准库外没有依赖项示例代码：
package mainimport ( "log" "github.com/fogleman/pt/pt")func main() { scene := pt.Scene{} wall := pt.SpecularMaterial(pt.HexColor(0xFCFAE1), 2) scene.Add(pt.NewSphere(pt.Vector{4, 7, 3}, 2, pt.LightMaterial(pt.Color{1, 1, 1}, 1, pt.NoAttenuation))) scene.Add(pt.NewCube(pt.Vector{-30, -1, -30}, pt.Vector{-8, 10, 30}, wall)) scene.Add(pt.NewCube(pt.Vector{-30, -1, -30}, pt.Vector{30, 0.376662, 30}, wall)) material := pt.GlossyMaterial(pt.Color{}, 1.5, pt.Radians(30)) mesh, err := pt.LoadOBJ("examples/gopher.obj", material) if err != nil { log.Fatalln("LoadOBJ error:", err) } mesh.SmoothNormals() scene.Add(mesh) camera := pt.LookAt(pt.Vector{8, 3, 0.5}, pt.Vector{-1, 2.5, 0.5}, pt.Vector{0, 1, 0}, 45) pt.IterativeRender("out%03d.png", 10, &scene, &camera, 2560/4, 1440/4, -1, 16, 4)}
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