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@@ -21,9 +21,11 @@
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#include "geomTriangles.h"
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#include "pnmFileTypeRegistry.h"
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#include "pnmImage.h"
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+#include "alphaTestAttrib.h"
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#include "materialAttrib.h"
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#include "textureAttrib.h"
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#include "cullFaceAttrib.h"
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+#include "transparencyAttrib.h"
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#include "ambientLight.h"
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#include "directionalLight.h"
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#include "spotlight.h"
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@@ -43,6 +45,10 @@
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#include <assimp/postprocess.h>
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+#ifndef AI_MATKEY_GLTF_ALPHAMODE
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+#define AI_MATKEY_GLTF_ALPHAMODE "$mat.gltf.alphaMode", 0, 0
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+#endif
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+
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using std::ostringstream;
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using std::stringstream;
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using std::string;
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@@ -502,6 +508,19 @@ load_material(size_t index) {
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}
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}
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+ // Alpha mode.
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+ aiString alpha_mode;
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+ if (AI_SUCCESS == mat.Get(AI_MATKEY_GLTF_ALPHAMODE, alpha_mode)) {
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+ if (strcmp(alpha_mode.C_Str(), "MASK") == 0) {
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+ PN_stdfloat cutoff = 0.5;
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+ mat.Get(AI_MATKEY_GLTF_ALPHACUTOFF, cutoff);
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+ state = state->add_attrib(AlphaTestAttrib::make(AlphaTestAttrib::M_greater_equal, cutoff));
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+ }
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+ else if (strcmp(alpha_mode.C_Str(), "BLEND") == 0) {
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+ state = state->add_attrib(TransparencyAttrib::make(TransparencyAttrib::M_alpha));
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+ }
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+ }
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+
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// And let's not forget the textures!
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CPT(TextureAttrib) tattr = DCAST(TextureAttrib, TextureAttrib::make());
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CPT(TexMatrixAttrib) tmattr;
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rdb