remove "done" folders, label "bs/droneenter, bs/dronelook, and bs/dronevanish files and functions"

src/core1/gu/ortho.c

@@ -0,0 +1,31 @@
+#include <ultra64.h>
+#include "functions.h"
+#include "variables.h"
+
+
+void guOrthoF(float mf[4][4], float l, float r, float b, float t, float n, float f, float scale)
+{
+	int	i, j;
+
+	guMtxIdentF(mf);
+
+	mf[0][0] = 2/(r-l);
+	mf[1][1] = 2/(t-b);
+	mf[2][2] = -2/(f-n);
+	mf[3][0] = -(r+l)/(r-l);
+	mf[3][1] = -(t+b)/(t-b);
+	mf[3][2] = -(f+n)/(f-n);
+	mf[3][3] = 1;
+
+	for (i=0; i<4; i++)
+	    for (j=0; j<4; j++)
+		mf[i][j] *= scale;
+}
+
+void guOrtho(Mtx *m, float l, float r, float b, float t, float n, float f, float scale)
+{
+	float	mf[4][4];
+
+	guOrthoF(mf, l, r, b, t, n, f, scale);
+	guMtxF2L(mf, m);
+}