1 files changed, 0 insertions, 181 deletions
diff --git a/progs/util/matrix.c b/progs/util/matrix.c
deleted file mode 100644
index 8be2c3111f..0000000000
--- a/progs/util/matrix.c
+++ /dev/null
@@ -1,181 +0,0 @@
-/*
- * matrix.c
- *
- * Some useful matrix functions.
- *
- * Brian Paul
- * 10 Feb 2004
- */
-
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-
-
-/**
- * Pretty-print the given matrix.
- */
-void
-PrintMatrix(const float p[16])
-{
-   printf("[ %6.3f %6.3f %6.3f %6.3f ]\n", p[0], p[4], p[8], p[12]);
-   printf("[ %6.3f %6.3f %6.3f %6.3f ]\n", p[1], p[5], p[9], p[13]);
-   printf("[ %6.3f %6.3f %6.3f %6.3f ]\n", p[2], p[6], p[10], p[14]);
-   printf("[ %6.3f %6.3f %6.3f %6.3f ]\n", p[3], p[7], p[11], p[15]);
-}
-
-
-/**
- * Build a glFrustum matrix.
- */
-void
-Frustum(float left, float right, float bottom, float top, float nearZ, float farZ, float *m)
-{
-   float x = (2.0F*nearZ) / (right-left);
-   float y = (2.0F*nearZ) / (top-bottom);
-   float a = (right+left) / (right-left);
-   float b = (top+bottom) / (top-bottom);
-   float c = -(farZ+nearZ) / ( farZ-nearZ);
-   float d = -(2.0F*farZ*nearZ) / (farZ-nearZ);
-
-#define M(row,col)  m[col*4+row]
-   M(0,0) = x;     M(0,1) = 0.0F;  M(0,2) = a;      M(0,3) = 0.0F;
-   M(1,0) = 0.0F;  M(1,1) = y;     M(1,2) = b;      M(1,3) = 0.0F;
-   M(2,0) = 0.0F;  M(2,1) = 0.0F;  M(2,2) = c;      M(2,3) = d;
-   M(3,0) = 0.0F;  M(3,1) = 0.0F;  M(3,2) = -1.0F;  M(3,3) = 0.0F;
-#undef M
-}
-
-
-/**
- * Build a glOrtho marix.
- */
-void
-Ortho(float left, float right, float bottom, float top, float nearZ, float farZ, float *m)
-{
-#define M(row,col)  m[col*4+row]
-   M(0,0) = 2.0F / (right-left);
-   M(0,1) = 0.0F;
-   M(0,2) = 0.0F;
-   M(0,3) = -(right+left) / (right-left);
-
-   M(1,0) = 0.0F;
-   M(1,1) = 2.0F / (top-bottom);
-   M(1,2) = 0.0F;
-   M(1,3) = -(top+bottom) / (top-bottom);
-
-   M(2,0) = 0.0F;
-   M(2,1) = 0.0F;
-   M(2,2) = -2.0F / (farZ-nearZ);
-   M(2,3) = -(farZ+nearZ) / (farZ-nearZ);
-
-   M(3,0) = 0.0F;
-   M(3,1) = 0.0F;
-   M(3,2) = 0.0F;
-   M(3,3) = 1.0F;
-#undef M
-}
-
-
-/**
- * Decompose a projection matrix to determine original glFrustum or
- * glOrtho parameters.
- */
-void
-DecomposeProjection( const float *m,
-                     int *isPerspective,
-                     float *leftOut, float *rightOut,
-                     float *botOut, float *topOut,
-                     float *nearOut, float *farOut)
-{
-   if (m[15] == 0.0) {
-      /* perspective */
-      float p[16];
-      const float x = m[0];  /* 2N / (R-L) */
-      const float y = m[5];  /* 2N / (T-B) */
-      const float a = m[8];  /* (R+L) / (R-L) */
-      const float b = m[9];  /* (T+B) / (T-B) */
-      const float c = m[10]; /* -(F+N) / (F-N) */
-      const float d = m[14]; /* -2FN / (F-N) */
-
-      /* These equations found with simple algebra, knowing the arithmetic
-       * use to set up a typical perspective projection matrix in OpenGL.
-       */
-      const float nearZ = -d / (1.0 - c);
-      const float farZ = (c - 1.0) * nearZ / (c + 1.0);
-      const float left = nearZ * (a - 1.0) / x;
-      const float right = 2.0 * nearZ / x + left;
-      const float bottom = nearZ * (b - 1.0) / y;
-      const float top = 2.0 * nearZ / y + bottom;
-
-      *isPerspective = 1;
-      *leftOut = left;
-      *rightOut = right;
-      *botOut = bottom;
-      *topOut = top;
-      *nearOut = nearZ;
-      *farOut = farZ;
-   }
-   else {
-      /* orthographic */
-      const float x = m[0];  /*  2 / (R-L) */
-      const float y = m[5];  /*  2 / (T-B) */
-      const float z = m[10]; /* -2 / (F-N) */
-      const float a = m[12]; /* -(R+L) / (R-L) */
-      const float b = m[13]; /* -(T+B) / (T-B) */
-      const float c = m[14]; /* -(F+N) / (F-N) */
-      /* again, simple algebra */
-      const float right  = -(a - 1.0) / x;
-      const float left   = right - 2.0 / x;
-      const float top    = -(b - 1.0) / y;
-      const float bottom = top - 2.0 / y;
-      const float farZ   = (c - 1.0) / z;
-      const float nearZ  = farZ + 2.0 / z;
-
-      *isPerspective = 0;
-      *leftOut = left;
-      *rightOut = right;
-      *botOut = bottom;
-      *topOut = top;
-      *nearOut = nearZ;
-      *farOut = farZ;
-   }
-}
-
-
-#if 0
-/* test harness */
-int
-main(int argc, char *argv[])
-{
-   float m[16], p[16];
-   float l, r, b, t, n, f;
-   int persp;
-   int i;
-
-#if 0
-   l = -.9;
-   r = 1.2;
-   b = -0.5;
-   t = 1.4;
-   n = 30;
-   f = 84;
-   printf("  Frustum(%f, %f, %f, %f, %f, %f\n",l+1, r+1.2, b+.5, t+.3, n, f);
-   Frustum(l+1, r+1.2, b+.5, t+.3, n, f, p);
-   DecomposeProjection(p, &persp, &l, &r, &b, &t, &n, &f);
-   printf("glFrustum(%f, %f, %f, %f, %f, %f)\n",
-          l, r, b, t, n, f);
-   PrintMatrix(p);
-#else
-   printf("Ortho(-1, 1, -1, 1, 10, 84)\n");
-   Ortho(-1, 1, -1, 1, 10, 84, m);
-   PrintMatrix(m);
-   DecomposeProjection(m, &persp, &l, &r, &b, &t, &n, &f);
-   printf("Ortho(%f, %f, %f, %f, %f, %f) %d\n", l, r, b, t, n, f, persp);
-#endif
-
-   return 0;
-}
-#endif