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More details are available about PBR and related properties under the Materials documentation.

Instructions

1. Add the following test function to a HOOPS 3DF application;:

   Code Block
   language cpp
   int TestPBR () { if (!IsShaderDriver()) // make sure driver is ogl or dx11 return TEST_UNSUPPORTED; HC_Open_Segment ("a"); HC_Open_Segment("image"); { HC_Set_Visibility("images=off"); auto load_png = [](const char * file_name, const char * image_name) -> bool { FILE *file = fopen(file_name), "rb"); if (!file) return false; fseek(file, 0, SEEK_END); int length = ftell(file); fseek(file, 0, SEEK_SET); unsigned char * buffer = new unsigned char[length]; fread(buffer, sizeof(unsigned char), length, file); fclose(file); HC_Insert_Compressed_Image(0, 0, 0, H_FORMAT_TEXT("png, name = %s", image_name), -1, -1, length, buffer); delete[] buffer; return true; }; if (!load_png("IMAGE_PBR_PATH/sandstonecliff-albedo.png", "sandstonecliff-albedo")) return TEST_IMAGE_MISSING; if (!load_png("IMAGE_PBR_PATH/sandstonecliff-ao.png", "sandstonecliff-ao")) return TEST_IMAGE_MISSING; if (!load_png("IMAGE_PBR_PATH/sandstonecliff-metalness.png", "sandstonecliff-metalness")) return TEST_IMAGE_MISSING; if (!load_png("IMAGE_PBR_PATH/sandstonecliff-roughness.png", "sandstonecliff-roughness")) return TEST_IMAGE_MISSING; if (!load_png("IMAGE_PBR_PATH/sandstonecliff-normal-ue.png", "sandstonecliff-normal")) return TEST_IMAGE_MISSING; } HC_Close_Segment(); HC_Set_PBR_Material("sandstonecliff-albedo", "sandstonecliff-normal", nullptr, "sandstonecliff-metalness", 0, "sandstonecliff-roughness", 0, "sandstonecliff-ao", 0, nullptr, 1.0, 1.0, 1.0, 1.0, 1.0, nullptr); HC_Insert_Distant_Light(1, 1, -1); HC_Open_Segment("shell"); { float const quad_points[] = { -0.75f, 0.75f, 0.0f, 0.75f, 0.75f, 0.0f, 0.75f, -0.75f, 0.0f, -0.75f, -0.75f, 0.0f }; int const quad_flist[] = {4, 0, 1, 2, 3}; float const quad_uvs[] = { 0.0f, 1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, }; HC_Set_Visibility("no edges, no markers"); HC_KEY shell_key = HC_Insert_Shell(4, quad_points, 5, quad_flist); HC_MSet_Vertex_Parameters(shell_key, 0, 4, 2, quad_uvs); } HC_Close_Segment(); HC_Close_Segment(); return TEST_COMPLETE; }

   Do no worry about IsShaderDriver() or the specific return values.

2. Download the Sand Stone Cliff images archive from FreePBR.com called sandstonecliff-ue and install it on your system.

3. Replace “IMAGE_PBR_PATH” in the code with the actual path to the unzipped Sand Stone Cliff files.

 This should result in a scene similar to that shown below.:

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