def atest_material_manager(self): sam_mgr = SampledManager() register_rgb_shadepoint() runtimes = [Runtime(), Runtime()] mat = Material() mat.load('lambertian', sam_mgr, spectral=False) mat.set_value('diffuse', RGBSpectrum(0.2, 0.3, 0.4)) mgr = MaterialManager() mgr.add('material1', mat) mgr.compile_shaders(sam_mgr, spectral=False) mgr.prepare_shaders(runtimes) code = """ hp = HitPoint() sp = ShadePoint() material_reflectance(hp, sp, 0) spec = sp.material_reflectance """ spec = RGBArg('spec', RGBSpectrum(0.5, 0.5, 0.5)) shader = Shader(code=code, args=[spec]) shader.compile(shaders=[mgr.ref_shader]) shader.prepare(runtimes) shader.execute() s = shader.get_value('spec') ls = RGBSpectrum(0.2, 0.3, 0.4) * (1.0 / math.pi) self.assertAlmostEqual(s.r, ls.r) self.assertAlmostEqual(s.g, ls.g) self.assertAlmostEqual(s.b, ls.b)
def test_rgb_area_light(self): sam_mgr = SampledManager() register_rgb_shadepoint() point = Vector3(0.0, 0.0, 55.92) e1 = Vector3(55.28, 0.0, 0.0) e2 = Vector3(0.0, 54.88, 0.0) normal = Vector3(0.0, 0.0, -1.0) rectangle = Rectangle(point, e1, e2, normal) material = Material() material.load('lambertian_emiter', sam_mgr) e = RGBSpectrum(0.5, 0.5, 0.5) material.set_value('emission', e) runtimes = [Runtime()] lgt = AreaLight(shape=rectangle, material=material) lgt.load('general', sam_mgr, spectral=False) lgt.compile() lgt.prepare(runtimes) ptrs = lgt.shader.get_ptrs() ptr_func = PointerArg('ptr_func', ptrs[0]) spec = RGBArg('spec', RGBSpectrum(0.5, 0.5, 0.5)) wi = Vec3Arg('wi', Vector3(0.0, 0.0, 0.0)) pos = Vec3Arg('position', Vector3(0.0, 0.0, 0.0)) n = Vec3Arg('normal', Vector3(0.0, 0.0, 0.0)) pdf = FloatArg('pdf', 0.0) emission = RGBArg('emission', RGBSpectrum(0.0, 0.0, 0.0)) code = """ hp = HitPoint() hp.hit = (4.0, 5, 6) sp = ShadePoint() __light_radiance(hp, sp, ptr_func) spec = sp.light_intensity wi = sp.wi position = sp.light_position normal = sp.light_normal pdf = sp.light_pdf emission = sp.material_emission """ shader = Shader(code=code, args=[ptr_func, wi, spec, pos, n, pdf, emission]) shader.compile() shader.prepare(runtimes) shader.execute() print("Position ", shader.get_value('position')) print("Normal ", shader.get_value('normal')) print("Light pdf ", shader.get_value('pdf')) print("Emission ", shader.get_value('emission')) print("Wi ", shader.get_value('wi')) print("Intensity ", shader.get_value('spec'))
def test_material_sampling_manager(self): sam_mgr = SampledManager() register_rgb_shadepoint() runtimes = [Runtime(), Runtime()] mat = Material() mat.load('lambertian', sam_mgr, spectral=False) mat.set_value('diffuse', RGBSpectrum(0.2, 0.3, 0.4)) mgr = MaterialManager() mgr.add('material1', mat) mgr.compile_shaders(sam_mgr, spectral=False) mgr.prepare_shaders(runtimes) code = """ hp = HitPoint() hp.normal = (0.1, 0.4, 0.66) hp.normal = normalize(hp.normal) sp = ShadePoint() material_sampling(hp, sp, 0) pdf = sp.pdf wi = sp.wi spec = sp.material_reflectance """ pdf = FloatArg('pdf', 0.0) wi = Vec3Arg('wi', Vector3(0.0, 0.0, 0.0)) spec = RGBArg('spec', RGBSpectrum(0.5, 0.5, 0.5)) shader = Shader(code=code, args=[pdf, wi, spec]) shader.compile(shaders=[mgr.sampling_shader]) shader.prepare(runtimes) shader.execute() s = shader.get_value('pdf') print(s) s = shader.get_value('wi') print(s) s = shader.get_value('spec') print(s) normal = Vector3(0.1, 0.4, 0.66) normal.normalize() print(cos_hemisphere(r1=0.1, r2=0.06, normal=normal, e=1.0))
def atest_material_glass(self): sam_mgr = SampledManager() register_rgb_shadepoint() runtimes = [Runtime()] mat = Material() mat.load('glass', sam_mgr, spectral=False) mat.set_value('ior', 1.5) mgr = MaterialManager() mgr.add('material1', mat) shaders = shaders_functions() for shader in shaders: shader.compile() shader.prepare(runtimes) mgr.compile_shaders(sam_mgr, spectral=False, shaders=shaders) mgr.prepare_shaders(runtimes) code = """ hp = HitPoint() hp.normal = normal sp = ShadePoint() sp.wo = wo material_sampling(hp, sp, 0) pdf = sp.pdf wi = sp.wi spec = sp.material_reflectance """ pdf = FloatArg('pdf', 0.0) wi = Vec3Arg('wi', Vector3(0.0, 0.0, 0.0)) ww = Vector3(5.0, 1.0, 0.0) ww.normalize() wo = Vec3Arg('wo', ww) nn = Vector3(0.0, 1.0, 0.0) nn.normalize() normal = Vec3Arg('normal', nn) spec = RGBArg('spec', RGBSpectrum(0.5, 0.5, 0.5)) shader = Shader(code=code, args=[pdf, wi, wo, normal, spec]) shader.compile(shaders=[mgr.sampling_shader]) shader.prepare(runtimes) shader.execute() s = shader.get_value('wi') print(s) s = shader.get_value('pdf') print(s) s = shader.get_value('spec') print(s) print('------------------------------') print('wo', ww) wi, pdf, ref = sampling_glass(1.5, ww, nn) print("wi", wi) print("pdf", pdf) print("ref", ref) ndotwi = abs(nn.dot(wi)) print("ndotwi", ndotwi) tmp = ndotwi / pdf path_weight = ref * tmp print("path weight", path_weight)