1 files changed, 49 insertions, 0 deletions
diff --git a/nebu/include/base/nebu_geom.h b/nebu/include/base/nebu_geom.h
new file mode 100644
index 0000000..7dc7ed1
--- /dev/null
+++ b/nebu/include/base/nebu_geom.h
@@ -0,0 +1,49 @@
+#ifndef NEBU_GEOM_H
+#define NEBU_GEOM_H
+
+/* some geometric routines always needed */
+
+/*
+typedef struct {
+  float v[4];
+} vec4;
+
+typedef struct {
+  float v[3];
+} vec3;
+*/
+
+typedef struct {
+  int vertex[3];
+  int normal[3];
+  int material;
+} face;
+
+typedef struct {
+ int vertex[4];
+ int normal[4];
+ int material;
+} quadFace;
+
+float length2(float *v);
+float length3(float *v);
+float length4(float *v);
+float length(float *v);
+void normalize(float *v);
+void normalize4(float *v);
+void crossprod(float *v1, float *v2, float *out);
+void normcrossprod(float *v1, float *v2, float *out);
+float scalarprod(float *v1, float *v2);
+float scalarprod2(float *v1, float *v2);
+float scalarprod4(float *v1, float *v2);
+void vsub(float *v1, float *v2, float *out);
+void vsub2(float *v1, float *v2, float *out);
+void vsub4(float *v1, float *v2, float *out);
+void vadd(float *v1, float *v2, float *out);
+void vadd2(float *v1, float *v2, float *out);
+void vadd4(float *v1, float *v2, float *out);
+void vcopy(float *v1, float *out);
+void vcopy4(float *v1, float *out);
+void vmul(float *v, float f);
+
+#endif