fix compile errors

diff --git a/math3d.h b/math3d.h
index dab580c..63faeb2 100644 (file)
--- a/math3d.h
+++ b/math3d.h
@@ -185,7 +185,11 @@ struct mat33 {
 // construct a zero matrix.
 static inline struct mat33 mzero() {
        struct mat33 m;
-       ZEROARR(m.m);
+       for (int i = 0; i < 3; ++i) {
+               for (int j = 0; j < 3; ++j) {
+                       m.m[i][j] = 0;
+               }
+       }
        return m;
 }
 // construct a matrix with the given diagonal.
@@ -224,9 +228,10 @@ static inline struct mat33 mcolumns(struct vec a, struct vec b, struct vec c) {
 // construct a matrix from three row vectors.
 static inline struct mat33 mrows(struct vec a, struct vec b, struct vec c) {
        struct mat33 m;
-       vstoref(a, m[0]);
-       vstoref(b, m[1]);
-       vstoref(c, m[2]);
+       vstoref(a, m.m[0]);
+       vstoref(b, m.m[1]);
+       vstoref(c, m.m[2]);
+       return m;
 }
 // construct the matrix A from vector v such that Ax = cross(v, x)
 static inline struct mat33 mcrossmat(struct vec v) {
@@ -353,6 +358,7 @@ struct quat {
        };
        float w;
 };
+// TODO: remove anonymous union + struct for strict c99 compatibility
 
 //
 // constructors