Weird errors when calling aiGetMaterialFloat (ASSIMP, C) - c

Question

I am following Assimp's documentation to retrieve properties from a struct aiMaterial type. From their documentation, this is the usage of aiGetMaterialString():
aiGetMaterialFloat(mat,<material-key>,<where-to-store>)
I was able to get the material name using aiGetMaterialString() and a propertie's color with aiGetMaterialColor(), for example, but adding this to my code:
float f = 1.0f;
aiGetMaterialFloat(mat, AI_MATKEY_SHININESS, (float*)&f);
results in:
gcc src/*.c examples/game.c -o bin/game.o -lGL -lGLEW -lSDL2 -lSDL2_image -lassimp -lm
In file included from /usr/include/assimp/scene.h:53:0,
from src/../include/mesh.h:13,
from src/mesh.c:1:
src/mesh.c: In function ‘mesh_setMaterialData’:
src/mesh.c:71:2: error: ‘pMat’ undeclared (first use in this function)
aiGetMaterialFloat(mat, AI_MATKEY_SHININESS, (float*)&f);
^
src/mesh.c:71:2: note: each undeclared identifier is reported only once for each function it appears in
src/mesh.c:71:2: error: ‘type’ undeclared (first use in this function)
aiGetMaterialFloat(mat, AI_MATKEY_SHININESS, (float*)&f);
^
src/mesh.c:71:2: error: ‘pKey’ undeclared (first use in this function)
aiGetMaterialFloat(mat, AI_MATKEY_SHININESS, (float*)&f);
^
src/mesh.c:71:2: error: ‘pOut’ undeclared (first use in this function)
aiGetMaterialFloat(mat, AI_MATKEY_SHININESS, (float*)&f);
^
src/mesh.c:71:2: error: expected ‘;’ before ‘aiGetMaterialFloatArray’
aiGetMaterialFloat(mat, AI_MATKEY_SHININESS, (float*)&f);
^
make: *** [makefile:2: ALL] Error 1
(in my code, mat is of type struct aiMaterial*).
The code I am using is also basically the same thing that's described in assimp/material.h, line 1363:
float specStrength = 1.f; // default value, remains unmodified if we fail.
aiGetMaterialFloat(mat, AI_MATKEY_SHININESS_STRENGTH,
(float*)&specStrength);
Could anyone explain to me what I am doing wrong?
Thank you.
Edit:
This is the definition of aiGetMaterialFloat
#define aiGetMaterialFloat (pMat, type, index, pKey, pOut) \
aiGetMaterialFloatArray(pMat, type, index, pKey, pOut, NULL)
and aiGetMaterialFloatArray
ASSIMP_API C_ENUM aiReturn aiGetMaterialFloatArray(const C_STRUCT aiMaterial* pMat, const char* pKey, unsigned int type, unsigned int index, float* pOut, unsigned int* pMax);
I replaced what I had earlier with:
aiGetMaterialFloatArray(mat, AI_MATKEY_SHININESS, &f, NULL);
and it compiles... If I swap around the arguments on this function call I can get gcc to tell me that the 4th argument I send is actually being perceived as the 6th for aiGetMaterialFloatArray (unsigned int* pMax). I really don't know enough about macros to understand what is going on.