cacalabs
/
libcaca
огледало от https://github.com/cacalabs/libcaca.git
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* Indentation fixes

tags/v0.99.beta17
Jean-Yves Lamoureux jylam преди 15 години
родител
0a8b2d04d5
ревизия
2b3fce124b
променени са 2 файла, в които са добавени 258 реда и са изтрити 232 реда
Обединен изглед
  1. +157
    -136
      caca/triangle.c
  2. +101
    -96
      examples/trifiller.c

+ 157
- 136
caca/triangle.c Целия файл

@@ -1,4 +1,4 @@
/* /*
* libcaca Colour ASCII-Art library * libcaca Colour ASCII-Art library
* Copyright (c) 2002-2006 Sam Hocevar <sam@zoy.org> * Copyright (c) 2002-2006 Sam Hocevar <sam@zoy.org>
* All Rights Reserved * All Rights Reserved
@@ -12,7 +12,7 @@
* http://sam.zoy.org/wtfpl/COPYING for more details. * http://sam.zoy.org/wtfpl/COPYING for more details.
*/ */


/* /*
* This file contains triangle drawing functions, both filled and outline. * This file contains triangle drawing functions, both filled and outline.
*/ */


@@ -39,8 +39,8 @@
* \param ch UTF-32 character to be used to draw the triangle outline. * \param ch UTF-32 character to be used to draw the triangle outline.
* \return This function always returns 0. * \return This function always returns 0.
*/ */
int caca_draw_triangle(caca_canvas_t *cv, int x1, int y1, int x2, int y2, int caca_draw_triangle(caca_canvas_t * cv, int x1, int y1, int x2, int y2,
int x3, int y3, uint32_t ch) int x3, int y3, uint32_t ch)
{ {
caca_draw_line(cv, x1, y1, x2, y2, ch); caca_draw_line(cv, x1, y1, x2, y2, ch);
caca_draw_line(cv, x2, y2, x3, y3, ch); caca_draw_line(cv, x2, y2, x3, y3, ch);
@@ -62,8 +62,8 @@ int caca_draw_triangle(caca_canvas_t *cv, int x1, int y1, int x2, int y2,
* \param y3 Y coordinate of the third point. * \param y3 Y coordinate of the third point.
* \return This function always returns 0. * \return This function always returns 0.
*/ */
int caca_draw_thin_triangle(caca_canvas_t *cv, int x1, int y1, int caca_draw_thin_triangle(caca_canvas_t * cv, int x1, int y1,
int x2, int y2, int x3, int y3) int x2, int y2, int x3, int y3)
{ {
caca_draw_thin_line(cv, x1, y1, x2, y2); caca_draw_thin_line(cv, x1, y1, x2, y2);
caca_draw_thin_line(cv, x2, y2, x3, y3); caca_draw_thin_line(cv, x2, y2, x3, y3);
@@ -86,17 +86,17 @@ int caca_draw_thin_triangle(caca_canvas_t *cv, int x1, int y1,
* \param ch UTF-32 character to be used to fill the triangle. * \param ch UTF-32 character to be used to fill the triangle.
* \return This function always returns 0. * \return This function always returns 0.
*/ */
int caca_fill_triangle(caca_canvas_t *cv, int x1, int y1, int x2, int y2, int caca_fill_triangle(caca_canvas_t * cv, int x1, int y1, int x2, int y2,
int x3, int y3, uint32_t ch) int x3, int y3, uint32_t ch)
{ {
int x, y, xmin, xmax, ymin, ymax; int x, y, xmin, xmax, ymin, ymax;
int xx1, xx2, xa, xb, sl21, sl31, sl32; int xx1, xx2, xa, xb, sl21, sl31, sl32;


/* Bubble-sort y1 <= y2 <= y3 */ /* Bubble-sort y1 <= y2 <= y3 */
if(y1 > y2) if (y1 > y2)
return caca_fill_triangle(cv, x2, y2, x1, y1, x3, y3, ch); return caca_fill_triangle(cv, x2, y2, x1, y1, x3, y3, ch);


if(y2 > y3) if (y2 > y3)
return caca_fill_triangle(cv, x1, y1, x3, y3, x2, y2, ch); return caca_fill_triangle(cv, x1, y1, x3, y3, x2, y2, ch);


/* Compute slopes and promote precision */ /* Compute slopes and promote precision */
@@ -111,27 +111,27 @@ int caca_fill_triangle(caca_canvas_t *cv, int x1, int y1, int x2, int y2,
ymin = y1 < 0 ? 0 : y1; ymin = y1 < 0 ? 0 : y1;
ymax = y3 + 1 < cv->height ? y3 + 1 : cv->height; ymax = y3 + 1 < cv->height ? y3 + 1 : cv->height;


if(ymin < y2) if (ymin < y2)
{ {
xa = x1 + sl21 * (ymin - y1); xa = x1 + sl21 * (ymin - y1);
xb = x1 + sl31 * (ymin - y1); xb = x1 + sl31 * (ymin - y1);
} }
else if(ymin == y2) else if (ymin == y2)
{ {
xa = x2; xa = x2;
xb = (y1 == y3) ? x3 : x1 + sl31 * (ymin - y1); xb = (y1 == y3) ? x3 : x1 + sl31 * (ymin - y1);
} }
else /* (ymin > y2) */ else /* (ymin > y2) */
{ {
xa = x3 + sl32 * (ymin - y3); xa = x3 + sl32 * (ymin - y3);
xb = x3 + sl31 * (ymin - y3); xb = x3 + sl31 * (ymin - y3);
} }


/* Rasterize our triangle */ /* Rasterize our triangle */
for(y = ymin; y < ymax; y++) for (y = ymin; y < ymax; y++)
{ {
/* Rescale xa and xb, recentering the division */ /* Rescale xa and xb, recentering the division */
if(xa < xb) if (xa < xb)
{ {
xx1 = (xa + 0x800) / 0x10000; xx1 = (xa + 0x800) / 0x10000;
xx2 = (xb + 0x801) / 0x10000; xx2 = (xb + 0x801) / 0x10000;
@@ -145,7 +145,7 @@ int caca_fill_triangle(caca_canvas_t *cv, int x1, int y1, int x2, int y2,
xmin = xx1 < 0 ? 0 : xx1; xmin = xx1 < 0 ? 0 : xx1;
xmax = xx2 + 1 < cv->width ? xx2 + 1 : cv->width; xmax = xx2 + 1 < cv->width ? xx2 + 1 : cv->width;


for(x = xmin; x < xmax; x++) for (x = xmin; x < xmax; x++)
caca_put_char(cv, x, y, ch); caca_put_char(cv, x, y, ch);


xa += y < y2 ? sl21 : sl32; xa += y < y2 ? sl21 : sl32;
@@ -155,125 +155,144 @@ int caca_fill_triangle(caca_canvas_t *cv, int x1, int y1, int x2, int y2,
return 0; return 0;
} }


/* This function actually renders the triangle, /* This function actually renders the triangle, but is not exported due to
* but is not exported due to sam's pedantic will. */ sam's pedantic will. */
static int caca_fill_triangle_textured_l(caca_canvas_t *cv, static int caca_fill_triangle_textured_l(caca_canvas_t * cv,
int x1, int y1, int x1, int y1,
int x2, int y2, int x2, int y2,
int x3, int y3, int x3, int y3,
caca_canvas_t *tex, caca_canvas_t * tex,
float u1, float v1, float u1, float v1,
float u2, float v2, float u2, float v2,
float u3, float v3) float u3, float v3)
{ {
uint32_t savedattr; uint32_t savedattr;


#define SWAP_F(a, b) {float c = a; a = b; b = c; } #define SWAP_F(a, b) {float c = a; a = b; b = c; }
/* (very) Naive and (very) float-based affine and (very) non-clipped and
/* (very) Naive and (very) non-corrected triangle mapper Accepts arbitrary texture sizes
* (very) float-based affine and Coordinates clamped to [0.0 - 1.0] (no repeat) */
* (very) non-clipped and if (!cv || !tex)
* (very) non-corrected triangle mapper return -1;
*
* Accepts arbitrary texture sizes
* Coordinates clamped to [0.0 - 1.0] (no repeat)
*/
if(!cv || !tex) return -1;


/* Bubble-sort y1 <= y2 <= y3 */ /* Bubble-sort y1 <= y2 <= y3 */
if(y1 > y2) if (y1 > y2)
return caca_fill_triangle_textured_l(cv, return caca_fill_triangle_textured_l(cv,
x2, y2, x1, y1, x3, y3, x2, y2, x1, y1, x3, y3,
tex, tex, u2, v2, u1, v1, u3, v3);
u2, v2, u1, v1, u3, v3); if (y2 > y3)
if(y2 > y3) return caca_fill_triangle_textured_l(cv,
return caca_fill_triangle_textured_l(cv,
x1, y1, x3, y3, x2, y2, x1, y1, x3, y3, x2, y2,
tex, tex, u1, v1, u3, v3, u2, v2);
u1, v1, u3, v3, u2, v2);


savedattr = caca_get_attr(cv, -1, -1); savedattr = caca_get_attr(cv, -1, -1);


/* Clip texture coordinates */ /* Clip texture coordinates */
if(u1<0.0f) u1 = 0.0f; if(v1<0.0f) v1 = 0.0f; if (u1 < 0.0f)
if(u2<0.0f) u2 = 0.0f; if(v2<0.0f) v2 = 0.0f; u1 = 0.0f;
if(u3<0.0f) u3 = 0.0f; if(v3<0.0f) v3 = 0.0f; if (v1 < 0.0f)
if(u1>1.0f) u1 = 1.0f; if(v1>1.0f) v1 = 1.0f; v1 = 0.0f;
if(u2>1.0f) u2 = 1.0f; if(v2>1.0f) v2 = 1.0f; if (u2 < 0.0f)
if(u3>1.0f) u3 = 1.0f; if(v3>1.0f) v3 = 1.0f; u2 = 0.0f;
if (v2 < 0.0f)
v2 = 0.0f;
if (u3 < 0.0f)
u3 = 0.0f;
if (v3 < 0.0f)
v3 = 0.0f;
if (u1 > 1.0f)
u1 = 1.0f;
if (v1 > 1.0f)
v1 = 1.0f;
if (u2 > 1.0f)
u2 = 1.0f;
if (v2 > 1.0f)
v2 = 1.0f;
if (u3 > 1.0f)
u3 = 1.0f;
if (v3 > 1.0f)
v3 = 1.0f;

/* Convert relative tex coordinates to absolute */ /* Convert relative tex coordinates to absolute */
int tw = caca_get_canvas_width(tex); int tw = caca_get_canvas_width(tex);
int th = caca_get_canvas_height(tex); int th = caca_get_canvas_height(tex);
u1 *= (float)tw;
u1*=(float)tw; u2*=(float)tw; u3*=(float)tw; u2 *= (float)tw;
v1*=(float)th; v2*=(float)th; v3*=(float)th; u3 *= (float)tw;
v1 *= (float)th;
v2 *= (float)th;
v3 *= (float)th;

int x, y; int x, y;
float y2y1 = y2-y1; float y2y1 = y2 - y1;
float y3y1 = y3-y1; float y3y1 = y3 - y1;
float y3y2 = y3-y2; float y3y2 = y3 - y2;
/* Compute slopes, making sure we don't divide by zero */ /* Compute slopes, making sure we don't divide by zero */
/* (in this case, we don't need the value anyway) */ /* (in this case, we don't need the value anyway) */
/* FIXME : only compute needed slopes */ /* FIXME : only compute needed slopes */
float sl12 = ((float)x2 - x1) / (y2y1==0?1:y2y1); float sl12 = ((float)x2 - x1) / (y2y1 == 0 ? 1 : y2y1);
float sl13 = ((float)x3 - x1) / (y3y1==0?1:y3y1); float sl13 = ((float)x3 - x1) / (y3y1 == 0 ? 1 : y3y1);
float sl23 = ((float)x3 - x2) / (y3y2==0?1:y3y2); float sl23 = ((float)x3 - x2) / (y3y2 == 0 ? 1 : y3y2);
float usl12 = (u2 - u1) / (y2y1 == 0 ? 1 : y2y1);
float usl12 = (u2 - u1) / (y2y1==0?1:y2y1); float usl13 = (u3 - u1) / (y3y1 == 0 ? 1 : y3y1);
float usl13 = (u3 - u1) / (y3y1==0?1:y3y1); float usl23 = (u3 - u2) / (y3y2 == 0 ? 1 : y3y2);
float usl23 = (u3 - u2) / (y3y2==0?1:y3y2); float vsl12 = (v2 - v1) / (y2y1 == 0 ? 1 : y2y1);
float vsl12 = (v2 - v1) / (y2y1==0?1:y2y1); float vsl13 = (v3 - v1) / (y3y1 == 0 ? 1 : y3y1);
float vsl13 = (v3 - v1) / (y3y1==0?1:y3y1); float vsl23 = (v3 - v2) / (y3y2 == 0 ? 1 : y3y2);
float vsl23 = (v3 - v2) / (y3y2==0?1:y3y2); float xa = (float)x1, xb = (float)x1;
float xa = (float) x1, xb = (float) x1;
float ua = u1, ub = u1; float ua = u1, ub = u1;
float va = v1, vb = v1; float va = v1, vb = v1;
float u, v; float u, v;
int s = 0; int s = 0;
/* Top */ /* Top */
for(y = y1 ; y < y2; y++) for (y = y1; y < y2; y++)
{ {
if (xb < xa)
if(xb < xa) { {
SWAP_F(xb, xa); SWAP_F(xb, xa);
SWAP_F(sl13, sl12); SWAP_F(sl13, sl12);
SWAP_F(ua, ub); SWAP_F(ua, ub);
SWAP_F(va, vb); SWAP_F(va, vb);
SWAP_F(usl13, usl12); SWAP_F(usl13, usl12);
SWAP_F(vsl13, vsl12); SWAP_F(vsl13, vsl12);
s=1; s = 1;
} }
float tus = (ub - ua) / (xb - xa); float tus = (ub - ua) / (xb - xa);
float tvs = (vb - va) / (xb - xa); float tvs = (vb - va) / (xb - xa);
v = va; u = ua; v = va;
u = ua;

/* scanline */ /* scanline */
for(x = xa ; x < xb; x++) for (x = xa; x < xb; x++)
{ {
u+=tus; u += tus;
v+=tvs; v += tvs;
/* FIXME: use caca_get_canvas_attrs / caca_get_canvas_chars */ /* FIXME: use caca_get_canvas_attrs / caca_get_canvas_chars */
uint32_t attr = caca_get_attr(tex, u, v); uint32_t attr = caca_get_attr(tex, u, v);
uint32_t c = caca_get_char(tex, u, v); uint32_t c = caca_get_char(tex, u, v);
caca_set_attr(cv, attr); caca_set_attr(cv, attr);
caca_put_char(cv, x, y, c); caca_put_char(cv, x, y, c);
} }
xa += sl13;
xa+=sl13; xb += sl12;
xb+=sl12; ua += usl13;
va += vsl13;
ua+=usl13; va+=vsl13; ub += usl12;
ub+=usl12; vb+=vsl12; vb += vsl12;
} }
if (s)
if(s)
{ {
SWAP_F(xb, xa); SWAP_F(xb, xa);
SWAP_F(sl13, sl12); SWAP_F(sl13, sl12);
@@ -282,24 +301,24 @@ static int caca_fill_triangle_textured_l(caca_canvas_t *cv,
SWAP_F(usl13, usl12); SWAP_F(usl13, usl12);
SWAP_F(vsl13, vsl12); SWAP_F(vsl13, vsl12);
} }
/* Bottom */ /* Bottom */
xb = (float) x2; xb = (float)x2;


/* These variables are set by 'top' routine /* These variables are set by 'top' routine and are in an incorrect state
* and are in an incorrect state if we only draw the bottom part if we only draw the bottom part */
*/ if (y1 == y2)
if(y1 == y2) { {
ua = u1; ua = u1;
ub = u2; ub = u2;
va = v1; va = v1;
vb = v2; vb = v2;
} }
for (y = y2; y < y3; y++)
for(y = y2 ; y < y3; y++)
{ {
if(xb <= xa) if (xb <= xa)
{ {
SWAP_F(xb, xa); SWAP_F(xb, xa);
SWAP_F(sl13, sl23); SWAP_F(sl13, sl23);
@@ -307,29 +326,32 @@ static int caca_fill_triangle_textured_l(caca_canvas_t *cv,
SWAP_F(va, vb); SWAP_F(va, vb);
SWAP_F(usl13, usl23); SWAP_F(usl13, usl23);
SWAP_F(vsl13, vsl23); SWAP_F(vsl13, vsl23);
} }
float tus = (ub - ua) / ((float)xb - xa); float tus = (ub - ua) / ((float)xb - xa);
float tvs = (vb - va) / ((float)xb - xa); float tvs = (vb - va) / ((float)xb - xa);
u = ua; v = va; u = ua;
v = va;

/* scanline */ /* scanline */
for(x = xa ; x < xb; x++) for (x = xa; x < xb; x++)
{ {
u+=tus; u += tus;
v+=tvs; v += tvs;
/* FIXME, can be heavily optimised */ /* FIXME, can be heavily optimised */
uint32_t attr = caca_get_attr(tex, u, v); uint32_t attr = caca_get_attr(tex, u, v);
uint32_t c = caca_get_char(tex, u, v); uint32_t c = caca_get_char(tex, u, v);
caca_set_attr(cv, attr); caca_set_attr(cv, attr);
caca_put_char(cv, x, y, c); caca_put_char(cv, x, y, c);
} }


xa+=sl13; xa += sl13;
xb+=sl23; xb += sl23;
ua += usl13;
ua+=usl13; va+=vsl13; va += vsl13;
ub+=usl23; vb+=vsl23; ub += usl23;
vb += vsl23;
} }


caca_set_attr(cv, savedattr); caca_set_attr(cv, savedattr);
@@ -347,31 +369,30 @@ static int caca_fill_triangle_textured_l(caca_canvas_t *cv,
* \param uv The coordinates of the texture (3{u,v}) * \param uv The coordinates of the texture (3{u,v})
* \return This function return 0 if ok, -1 if canvas or texture are missing. * \return This function return 0 if ok, -1 if canvas or texture are missing.
*/ */
int caca_fill_triangle_textured(caca_canvas_t *cv, int caca_fill_triangle_textured(caca_canvas_t * cv,
int coords[6], int coords[6],
caca_canvas_t *tex, caca_canvas_t * tex, float uv[6])
float uv[6]) { {
return caca_fill_triangle_textured_l(cv, return caca_fill_triangle_textured_l(cv,
coords[0], coords[1], coords[0], coords[1],
coords[2], coords[3], coords[2], coords[3],
coords[4], coords[5], coords[4], coords[5],
tex, tex,
uv[0], uv[1], uv[0], uv[1],
uv[2], uv[3], uv[2], uv[3], uv[4], uv[5]);
uv[4], uv[5]);
} }






/* /*
* XXX: The following functions are aliases. * XXX: The following functions are aliases.
*/ */


int cucul_draw_triangle(cucul_canvas_t *, int, int, int, int, int, int cucul_draw_triangle(cucul_canvas_t *, int, int, int, int, int,
int, uint32_t) CACA_ALIAS(caca_draw_triangle); int, uint32_t) CACA_ALIAS(caca_draw_triangle);
int cucul_draw_thin_triangle(cucul_canvas_t *, int, int, int, int, int cucul_draw_thin_triangle(cucul_canvas_t *, int, int, int, int,
int, int) CACA_ALIAS(caca_draw_thin_triangle); int,
int cucul_fill_triangle(cucul_canvas_t *, int, int, int, int, int, int) CACA_ALIAS(caca_draw_thin_triangle);
int, uint32_t) CACA_ALIAS(caca_fill_triangle); int cucul_fill_triangle(cucul_canvas_t *, int, int, int, int, int, int,
uint32_t) CACA_ALIAS(caca_fill_triangle);

+ 101
- 96
examples/trifiller.c Целия файл

@@ -1,4 +1,4 @@
/* /*
* trifiller texture mapping features * trifiller texture mapping features
* Copyright (c) 2009 Jean-Yves Lamoureux <jylam@lnxscene.org> * Copyright (c) 2009 Jean-Yves Lamoureux <jylam@lnxscene.org>
* All Rights Reserved * All Rights Reserved
@@ -27,141 +27,139 @@
#include "../src/common-image.h" #include "../src/common-image.h"


/* M_PI / cos / sin */ /* M_PI / cos / sin */
#include <math.h> #include <math.h>




#define SQUARE_SIZE 20 #define SQUARE_SIZE 20


int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {
/* libcaca/libcaca contexts */ /* libcaca/libcaca contexts */
caca_canvas_t *cv; caca_display_t *dp; caca_canvas_t *cv;
caca_display_t *dp;
caca_canvas_t *tex; caca_canvas_t *tex;
/* cached canvas size */ /* cached canvas size */
int ww, wh, tw, th; int ww, wh, tw, th;
/* logic */ /* logic */
int quit = 0; int quit = 0;
int update = 1; int update = 1;
int px, py; int px, py;
float angle = 0; float angle = 0;
float square[6][2] = { float square[6][2] = {
{-SQUARE_SIZE, -SQUARE_SIZE}, {-SQUARE_SIZE, -SQUARE_SIZE},
{ SQUARE_SIZE, -SQUARE_SIZE}, {SQUARE_SIZE, -SQUARE_SIZE},
{ SQUARE_SIZE, SQUARE_SIZE}, {SQUARE_SIZE, SQUARE_SIZE},
{-SQUARE_SIZE, SQUARE_SIZE}, {-SQUARE_SIZE, SQUARE_SIZE},
}; };
float uv1[6] = { float uv1[6] = {
0, 0, 0, 0,
1, 0, 1, 0,
1, 1 1, 1
}; };
float uv2[6] = { float uv2[6] = {
0, 0, 0, 0,
1, 1, 1, 1,
0, 1 0, 1
}; };
float rotated[4][2]; float rotated[4][2];
int coords1[6], coords2[6]; int coords1[6], coords2[6];
/* Create displayed canvas */ /* Create displayed canvas */
cv = caca_create_canvas(0, 0); cv = caca_create_canvas(0, 0);
if(!cv) if (!cv)
{ {
fprintf(stderr, "%s: unable to initialise libcaca\n", argv[0]); fprintf(stderr, "%s: unable to initialise libcaca\n", argv[0]);
return 1; return 1;
} }
/* Create texture holding canvas */ /* Create texture holding canvas */
tex = caca_create_canvas(16, 16); tex = caca_create_canvas(16, 16);
if(!tex) if (!tex)
{ {
fprintf(stderr, "%s: unable to initialise libcaca\n", argv[0]); fprintf(stderr, "%s: unable to initialise libcaca\n", argv[0]);
return 1; return 1;
} }
/* Open window */ /* Open window */
dp = caca_create_display(cv); dp = caca_create_display(cv);
if(!dp) if (!dp)
{ {
fprintf(stderr, "%s: unable to initialise libcaca\n", argv[0]); fprintf(stderr, "%s: unable to initialise libcaca\n", argv[0]);
return 1; return 1;
} }
/* Set the window title */ /* Set the window title */
caca_set_display_title(dp, "trifiller"); caca_set_display_title(dp, "trifiller");
/* Frame duration */ /* Frame duration */
caca_set_display_time(dp, 10000); caca_set_display_time(dp, 10000);
/* Get displayed canvas size */ /* Get displayed canvas size */
ww = caca_get_canvas_width(cv); ww = caca_get_canvas_width(cv);
wh = caca_get_canvas_height(cv); wh = caca_get_canvas_height(cv);
/* Texture size */ /* Texture size */
tw = caca_get_canvas_width(tex); tw = caca_get_canvas_width(tex);
th = caca_get_canvas_height(tex); th = caca_get_canvas_height(tex);
/* Load texture if any */ /* Load texture if any */
if(argc == 2) if (argc == 2)
{ {
struct image *im = load_image(argv[1]); struct image *im = load_image(argv[1]);
if(!im) if (!im)
{ {
fprintf(stderr, "%s: unable to load image '%s'\n", argv[0], argv[1]); fprintf(stderr, "%s: unable to load image '%s'\n", argv[0],
argv[1]);
return 1; return 1;
} }
caca_set_dither_algorithm(im->dither, caca_set_dither_algorithm(im->dither,
caca_get_dither_algorithm_list(NULL)[4]); caca_get_dither_algorithm_list(NULL)[4]);
caca_dither_bitmap(tex, caca_dither_bitmap(tex, 0, 0, tw, th, im->dither, im->pixels);
0, 0,
tw, th,
im->dither, im->pixels);
unload_image(im); unload_image(im);
} }
/* or generate one */ /* or generate one */
else else
{ {
int i; int i;
for(i = 0; i < 16; i ++) for (i = 0; i < 16; i++)
{ {
caca_set_color_ansi(tex, (i+1)%0xF, i%0xF); caca_set_color_ansi(tex, (i + 1) % 0xF, i % 0xF);
caca_put_str(tex, 0, i, "0123456789ABCDEF"); caca_put_str(tex, 0, i, "0123456789ABCDEF");
} }
} }


px = 0; px = 0;
py = 0; py = 0;
while (!quit)
while(!quit)
{ {
caca_event_t ev; caca_event_t ev;
unsigned int const event_mask = CACA_EVENT_KEY_PRESS unsigned int const event_mask = CACA_EVENT_KEY_PRESS
| CACA_EVENT_RESIZE | CACA_EVENT_RESIZE | CACA_EVENT_QUIT;
| CACA_EVENT_QUIT;
int event; int event;
if (update)
if(update)
event = caca_get_event(dp, event_mask, &ev, 0); event = caca_get_event(dp, event_mask, &ev, 0);
else else
event = caca_get_event(dp, event_mask, &ev, -1); event = caca_get_event(dp, event_mask, &ev, -1);
while (event)
while(event)
{ {
if(caca_get_event_type(&ev) & CACA_EVENT_KEY_PRESS) if (caca_get_event_type(&ev) & CACA_EVENT_KEY_PRESS)
switch(caca_get_event_key_ch(&ev)) switch (caca_get_event_key_ch(&ev))
{ {
case 'q': case 'q':
case 'Q': case 'Q':
case CACA_KEY_ESCAPE: case CACA_KEY_ESCAPE:
@@ -180,69 +178,76 @@ int main(int argc, char *argv[])
px++; px++;
break; break;
case 'a': case 'a':
angle+=1.0f; angle += 1.0f;
break; break;
case 's': case 's':
angle-=1.0f; angle -= 1.0f;
break; break;
} }
else if(caca_get_event_type(&ev) == CACA_EVENT_RESIZE) else if (caca_get_event_type(&ev) == CACA_EVENT_RESIZE)
{ {
caca_refresh_display(dp); caca_refresh_display(dp);
ww = caca_get_event_resize_width(&ev); ww = caca_get_event_resize_width(&ev);
wh = caca_get_event_resize_height(&ev); wh = caca_get_event_resize_height(&ev);
update = 1; update = 1;
} }
else if(caca_get_event_type(&ev) & CACA_EVENT_QUIT) else if (caca_get_event_type(&ev) & CACA_EVENT_QUIT)
quit = 1; quit = 1;
event = caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0); event = caca_get_event(dp, CACA_EVENT_KEY_PRESS, &ev, 0);
} }
/* 2D Rotation around screen center */ /* 2D Rotation around screen center */
int p; int p;
for(p=0; p<4; p++) for (p = 0; p < 4; p++)
{ {
rotated[p][0] = square[p][0] * cos(angle*M_PI/180.0f) - square[p][1] * sin(angle*M_PI/180.0f); rotated[p][0] =
rotated[p][1] = square[p][0] * sin(angle*M_PI/180.0f) + square[p][1] * cos(angle*M_PI/180.0f); square[p][0] * cos(angle * M_PI / 180.0f) -
square[p][1] * sin(angle * M_PI / 180.0f);
rotated[p][0] += ww/2 + px; rotated[p][1] =
rotated[p][1] += wh/2 + py; square[p][0] * sin(angle * M_PI / 180.0f) +
square[p][1] * cos(angle * M_PI / 180.0f);

rotated[p][0] += ww / 2 + px;
rotated[p][1] += wh / 2 + py;
} }
angle += 1.0f;
angle+=1.0f;
/* Reaarange coordinates to fit libcaca's format */ /* Reaarange coordinates to fit libcaca's format */
coords1[0] = rotated[0][0]; coords1[1] = rotated[0][1]; coords1[0] = rotated[0][0];
coords1[2] = rotated[1][0]; coords1[3] = rotated[1][1]; coords1[1] = rotated[0][1];
coords1[4] = rotated[2][0]; coords1[5] = rotated[2][1]; coords1[2] = rotated[1][0];
coords1[3] = rotated[1][1];
coords2[0] = rotated[0][0]; coords2[1] = rotated[0][1]; coords1[4] = rotated[2][0];
coords2[2] = rotated[2][0]; coords2[3] = rotated[2][1]; coords1[5] = rotated[2][1];
coords2[4] = rotated[3][0]; coords2[5] = rotated[3][1]; coords2[0] = rotated[0][0];
coords2[1] = rotated[0][1];
coords2[2] = rotated[2][0];
coords2[3] = rotated[2][1];
coords2[4] = rotated[3][0];
coords2[5] = rotated[3][1];

/* Display two triangles */ /* Display two triangles */
caca_fill_triangle_textured(cv, /* canvas */ caca_fill_triangle_textured(cv, /* canvas */
coords1, /* triangle coordinates */ coords1, /* triangle coordinates */
tex, /* texture canvas */ tex, /* texture canvas */
uv1); /* texture coordinates */ uv1); /* texture coordinates */
caca_fill_triangle_textured(cv, caca_fill_triangle_textured(cv, coords2, tex, uv2);
coords2,
tex,
uv2);
/* Refresh display and clear for next frame */ /* Refresh display and clear for next frame */
caca_refresh_display(dp); caca_refresh_display(dp);
caca_clear_canvas(cv); caca_clear_canvas(cv);
} }
caca_free_display(dp); caca_free_display(dp);
caca_free_canvas(cv); caca_free_canvas(cv);
caca_free_canvas(tex); caca_free_canvas(tex);
return 0; return 0;
} }

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