Add missing contructor type and operator overloads

The vec4(float) constructor and several common operators that are
available in GLSL were missing.  There are probably still some that
are missing, but they can be added later.

1 files changed, 41 insertions, 0 deletions

diff --git a/include/glu3.h b/include/glu3.h
index 9f082ce..3d7a10b 100644
--- a/include/glu3.h
+++ b/include/glu3.h
@@ -48,6 +48,15 @@ struct GLUvec4 {
 	{
 	}
 
+	/** Initialize vector from one float value. */
+	inline GLUvec4(GLfloat v)
+	{
+		values[0] = v;
+		values[1] = v;
+		values[2] = v;
+		values[3] = v;
+	}
+
 	/** Initialize vector from four float values. */
 	inline GLUvec4(GLfloat x , GLfloat y, GLfloat z, GLfloat w)
 	{
@@ -97,6 +106,38 @@ struct GLUvec4 {
 };
 
 
+#ifdef __cplusplus
+inline GLUvec4 operator *(GLfloat f, const GLUvec4 &v)
+{
+	return v * f;
+}
+
+inline GLUvec4 &operator +=(GLUvec4 &l, const GLUvec4 &r)
+{
+	l = l + r;
+	return l;
+}
+
+inline GLUvec4 &operator -=(GLUvec4 &l, const GLUvec4 &r)
+{
+	l = l - r;
+	return l;
+}
+
+inline GLUvec4 &operator *=(GLUvec4 &l, const GLUvec4 &r)
+{
+	l = l * r;
+	return l;
+}
+
+inline GLUvec4 &operator *=(GLUvec4 &l, GLfloat r)
+{
+	l = l * r;
+	return l;
+}
+#endif /* __cplusplus */
+
+
 /**
  * Basic 4x4 matrix type.
  */