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/*
FILE: xgl_interface.c
PURPOSE: Creation and access to a OpenGL window
to wet+sticky using OpenGL
AUTHOR: David England
VERSION: 1.00 (21-June-96)
Copyright 1991, 1992, 2002, 2003 Tunde Cockshott, Kevin Waite, David England.
Contact David England d.england@livjm.ac.uk
School of Computing and Maths Sciences,
Liverpool John Moores University
Liverpool L3 3AF
United Kingdom
Phone +44 151 231 2271
Wet and Sticky is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Wet and Sticky 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 General Public License for more details. You should have received a copy of the GNU General Public License along with Wet and Sticky; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <GL/gl.h>
#include <GL/glu.h>
/*#include <imp.h>*/
/*#include "aux.h"*/
#include <stdio.h>
#include "constants.h"
#include "types.h"
#include "engine.h"
#include "canvas.h"
static int count=0;
void nullProc()
{
}
void SetupCmap()
{
}
float Value(n1, n2, hue)
float n1, n2, hue;
{
if (hue > 360 )
hue = hue -360;
else if (hue < 0 )
hue = hue +360;
if (hue < 60 )
return n1+(n2-n1)*hue/60;
else if (hue < 180 )
return n2;
else if (hue < 240 )
return n1+(n2-n1)*(240-hue)/60;
else return n1;
}
RGB_COLOUR hls_to_rgb(h, l, s)
int h;
float l;
float s;
{
RGB_COLOUR rgb_colour;
float m1, m2;
if (l <= 0.5 )
m2 = l*(1+s);
else
m2 = l+s - l*s;
m1 = 2*l-m2;
rgb_colour.r = Value(m1, m2, h+120);
rgb_colour.g = Value(m1,m2, h);
rgb_colour.b = Value(m1,m2, h-120);
return (rgb_colour);
}
void
DrawPoint(x,y,hls_col)
int x;
int y;
HLS_COLOUR hls_col;
/* Draw a point on the window and the back-up Pixmap */
{
RGB_COLOUR rgb_colour;
rgb_colour = hls_to_rgb(hls_col.hue,
hls_col.lightness,
hls_col.saturation);
printf("h %.2f l %.2f s %.2f\n", hls_col.hue, hls_col.lightness,
hls_col.saturation);
printf( "r %.2f g %.2f b %.2f\n", rgb_colour.r, rgb_colour.g,
rgb_colour.b);
glColor3f(rgb_colour.r, rgb_colour.g, rgb_colour.b);
glBegin(GL_POINTS);
glVertex2s(x,y);
glVertex2s(x+1,y+1);
glEnd();
}
void
DrawVolumePoint(x,y,attr)
int x;
int y;
int attr;
{
/*set colour, draw point at offset */
}
void
DrawDrynessPoint(x,y,attr)
int x;
int y;
int attr;
/* Draw a point on the window and the back-up Pixmap */
{
}
void
ClearWindow()
{
}
static void
CleanWindow()
/* Fill a window with a solid, white rectangle */
{
}
void CreateWindows(argc, argv, width, height)
int *argc;
char **argv;
int width;
int height;
{
auxInitDisplayMode( AUX_RGBA);
auxInitPosition(50,50, width*3, height);
auxInitWindow(argv[0]);
glClearColor(1.0, 1.0, 1.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
}
static void
draw_labels()
{
}
void paint_cell(cell, x, y)
CELL_PTR cell;
int x, y;
{
DrawPoint(x,y, cell->contents.colour);
/* volColour is an index into the colour table in the range [0,255].
It is used to give a false colour image of the canvas's volume. */
/*DrawVolumePoint(x,y,volColour);*/
/*DrawDrynessPoint(x,y,dryness);*/
}
void draw_full_canvas()
{
int x, y;
CELL_PTR cell;
POINT p;
glClear(GL_COLOR_BUFFER_BIT);
if (DEBUG) {
printf ("Starting to paint full canvas...");
fflush(stdout);
}
for (y=0; y < CANVAS_HEIGHT; y++)
for (x=0; x < CANVAS_WIDTH; x++) {
p.x = x;
p.y = y;
cell = get_cell(p);
paint_cell(cell, x, y);
}
glFlush();
sleep(10);
if (DEBUG) printf ("done.\n");
}
void
bump_map()
{
POINT p;
CELL_PTR cell;
register int x, y;
register int colour;
for (y=0; y < CANVAS_HEIGHT; y++) {
for (x=0; x < CANVAS_WIDTH; x++) {
p.x = x;
p.y = y;
cell = get_cell(p);
colour = (int) new_intensity_value(p);
/* colour = (int) (cell->contents.colour.hue *
((float) MAX_COLOUR_INDEX / 360.0));*/
DrawDrynessPoint(x,y,colour);
}
}
}
void evolve_paint()
{
int k;
POINT p;
CELL_PTR cell;
int new_x, new_y;
extern int count;
/*count++;
if (count > 500) {
fprintf(stderr,".");
fflush(stderr);
bump_map();
}*/
for (k=0; k < STEP_LIMIT; k++) single_step();
while (TRUE) {
next_cell_for_repaint(&cell, &p);
if (cell == NIL) return;
paint_cell(cell, p.x, p.y);
glFlush();
}
}
void StartVolumeWindow()
{
}
void StartDrynessWindow()
{
}
void StartWindows()
{
draw_full_canvas();
compute_shade_vectors(); /* Set vectors for shading */
draw_labels();
/*auxIdleFunc(evolve_paint);
auxMainLoop(draw_full_canvas);*/
}
void
stroke()
{
}
void
stroke_motion()
{
}
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