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view.c
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view.c
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/*
* view.c
*/
#include "awkgl.h"
NODE *do_Viewport(int);
NODE *do_Ortho(int);
NODE *do_Frustum(int);
NODE *do_Perspective(int);
NODE *do_Lookat(int);
NODE *
do_Viewport(int nargs)
{
NODE *tmp;
GLint x;
GLint y;
GLsizei w;
GLsizei h;
tmp = (NODE*) get_actual_argument(0, FALSE, FALSE);
x = (GLint) force_number(tmp);
tmp = (NODE*) get_actual_argument(1, FALSE, FALSE);
y = (GLint) force_number(tmp);
tmp = (NODE*) get_actual_argument(2, FALSE, FALSE);
w = (GLsizei) force_number(tmp);
tmp = (NODE*) get_actual_argument(3, FALSE, FALSE);
h = (GLsizei) force_number(tmp);
//printf("%d %d %d %d\n", x,y,w,h);
glViewport(x, y, w, h);
return make_number((AWKNUM) 0);
}
NODE *
do_Ortho(int nargs)
{
NODE *tmp;
GLdouble left;
GLdouble right;
GLdouble bottom;
GLdouble top;
GLdouble near;
GLdouble far;
tmp = (NODE*) get_actual_argument(0, FALSE, FALSE);
left = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(1, FALSE, FALSE);
right = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(2, FALSE, FALSE);
bottom = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(3, FALSE, FALSE);
top = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(4, FALSE, FALSE);
near = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(5, FALSE, FALSE);
far = (GLdouble) (force_number(tmp));
//printf("%f %f %f %f %f %f \n", left,right,bottom,top,near,far);
glOrtho(left, right, bottom, top, near, far);
return make_number((AWKNUM) 0);
}
NODE *
do_Frustum(int nargs)
{
NODE *tmp;
GLdouble left;
GLdouble right;
GLdouble bottom;
GLdouble top;
GLdouble near;
GLdouble far;
tmp = (NODE*) get_actual_argument(0, FALSE, FALSE);
left = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(1, FALSE, FALSE);
right = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(2, FALSE, FALSE);
bottom = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(3, FALSE, FALSE);
top = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(4, FALSE, FALSE);
near = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(5, FALSE, FALSE);
far = (GLdouble) (force_number(tmp));
//printf("%f %f %f %f %f %f \n",
// left, right, bottom, top, near, far);
glFrustum(left, right, bottom, top, near, far);
return make_number((AWKNUM) 0);
}
NODE *
do_Perspective(int nargs)
{
NODE *tmp;
GLdouble angle;
GLdouble aspect;
GLdouble front;
GLdouble back;
tmp = (NODE*) get_actual_argument(0, FALSE, FALSE);
angle = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(1, FALSE, FALSE);
aspect = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(2, FALSE, FALSE);
front = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(3, FALSE, FALSE);
back = (GLdouble) (force_number(tmp));
//?glMatrixMode(GL_PROJECTION);
//?glLoadIdentity();
gluPerspective(angle, aspect, front, back);
return make_number((AWKNUM) 0);
}
NODE *
do_Lookat(int nargs)
{
NODE *tmp;
GLdouble eyeX;
GLdouble eyeY;
GLdouble eyeZ;
GLdouble centerX;
GLdouble centerY;
GLdouble centerZ;
GLdouble upX;
GLdouble upY;
GLdouble upZ;
tmp = (NODE*) get_actual_argument(0, FALSE, FALSE);
eyeX = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(1, FALSE, FALSE);
eyeY = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(2, FALSE, FALSE);
eyeZ = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(3, FALSE, FALSE);
centerX = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(4, FALSE, FALSE);
centerY = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(5, FALSE, FALSE);
centerZ = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(6, FALSE, FALSE);
upX = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(7, FALSE, FALSE);
upY = (GLdouble) (force_number(tmp));
tmp = (NODE*) get_actual_argument(8, FALSE, FALSE);
upZ = (GLdouble) (force_number(tmp));
gluLookAt(eyeX, eyeY, eyeZ, centerX, centerY, centerZ, upX, upY, upZ);
//?glMatrixMode( GL_MODELVIEW );
//?glLoadIdentity();
return make_number((AWKNUM) 0);
}