Diff: Graphics/Object3D.cpp

Revision:

1:b7a86d680935

Parent:

0:2a5dccfd318f

--- a/Graphics/Object3D.cpp	Thu Jan 14 00:49:39 2010 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,156 +0,0 @@
-/* 
- * libmbed-graphics 2D and wireframe 3D graphics library for the MBED
- * microcontroller platform
- * Copyright (C) <2009> Michael Sheldon <mike@mikeasoft.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
- 
-#include "Object3D.h"
-
-Object3D::Object3D() {
-    _x = 0;
-    _y = 0;
-    _z = 0;
-    _rx = 0;
-    _ry = 0;
-    _rz = 0;
-    _sx = 1;
-    _sy = 1;
-    _sz = 1;
-    _colour = 0xffffff;
-}
-
-void Object3D::position(int x, int y, int z) {
-    _x = x;
-    _y = y;
-    _z = z;
-}
-
-void Object3D::rotate(float rx, float ry, float rz) {
-    _rx = rx;
-    _ry = ry;
-    _rz = rz;
-}
-
-void Object3D::scale(float sx, float sy, float sz) {
-    _sx = sx;
-    _sy = sy;
-    _sz = sz;
-}
-
-void Object3D::colour(int colour) {
-    _colour = colour;
-}
-
-#define FASTSINCOS
-
-#ifdef FASTSINCOS
-
-// http://www.dspguru.com/dsp/tricks/parabolic-approximation-of-sin-and-cos
-
-#define M_PI       3.14159265358979323846
-#define M_PI_2     1.57079632679489661923
-#define M_PI_4     0.785398163397448309616
-#define M_C        0.71256755058
-
-void sincosf(float angle, float *sinx, float *cosx)
-{
-    int quarter = int(floor(angle/M_PI_2));
-    
-    float modphase = angle - quarter*M_PI_2;
-    if ( modphase < 0 )
-        modphase += M_PI_2;
-    
-    quarter %= 4;
-    if ( quarter < 0 )
-        quarter += 4;
-    
-    modphase = modphase/M_PI_2;
-
-    //printf("Angle: %f, q: %d, mod: %f\n", angle, quarter, modphase);
-    float x, temp;
-    switch (quarter)
-    { 
-    case 0:
-        // First quarter, angle = 0 .. pi/2
-        x = modphase - 0.5f;      // 1 sub
-        temp = (2 - 4*M_C)*x*x + M_C; // 2 mul, 1 add
-        *sinx = temp + x;              // 1 add
-        *cosx = temp - x;              // 1 sub
-        break;
-    case 1:
-        // Second quarter, angle = pi/2 .. pi
-        x = 0.5f - modphase;      // 1 sub
-        temp = (2 - 4*M_C)*x*x + M_C; // 2 mul, 1 add
-        *sinx = x + temp;              // 1 add
-        *cosx = x - temp;              // 1 sub
-        break;
-    case 2:
-        // Third quarter, angle = pi .. 1.5pi
-        x = modphase - 0.5f;      // 1 sub
-        temp = (4*M_C - 2)*x*x - M_C; // 2 mul, 1 sub
-        *sinx = temp - x;              // 1 sub
-        *cosx = temp + x;              // 1 add
-        break;
-    case 3:
-        // Fourth quarter, angle = 1.5pi..2pi
-        x = modphase - 0.5f;      // 1 sub
-        temp = (2 - 4*M_C)*x*x + M_C; // 2 mul, 1 add
-        *sinx = x - temp;              // 1 sub
-        *cosx = x + temp;              // 1 add
-        break;
-    }
-}
-
-#else // FASTSINCOS
-
-void sincosf(float angle, float *sinx, float *cosx)
-{
-  *sinx = sin(angle);
-  *cosx = cos(angle);
-}
-
-#endif // FASTSINCOS
-
-
-void rotate3d(int *x, int *y, int *z, float anglex, float angley, float anglez, int count)
-{    
-    float sinx, cosx, siny, cosy, sinz, cosz;
-    sincosf(anglex, &sinx, &cosx);    
-    sincosf(angley, &siny, &cosy);
-    sincosf(anglez, &sinz, &cosz);
-    
-    for ( int i=0; i < count; i++)
-    {
-        int x1 = x[i];
-        int y1 = y[i];
-        int z1 = z[i];
-        
-        int y2 = cosx * y1 - sinx * z1;
-        int z2 = sinx * y1 + cosx * z1;
-    
-        int x2 = cosy * x1 + siny * z2;
-        int z3 = -siny * x1 + cosy * z2;
-        
-        int x3 = cosz * x2 - sinz * y2;
-        int y3 = sinz * x2 + cosz * y2;
-        
-        x[i] = x3;
-        y[i] = y3;
-        z[i] = z3;
-    }
-}