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libcaca
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* Added much disco transition (ellipses suck). YMCA \o/

tags/v0.99.beta14
Jean-Yves Lamoureux jylam 18 years ago
parent
cc80e458ca
commit
f3578b26fb
1 changed files with 103 additions and 11 deletions
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  1. +103
    -11
      src/cacademo.c

+ 103
- 11
src/cacademo.c View File

@@ -31,6 +31,7 @@

enum action { PREPARE, INIT, UPDATE, RENDER, FREE };

void do_transition(cucul_canvas_t *mask, int transition, float time);
void plasma(enum action, cucul_canvas_t *);
void metaballs(enum action, cucul_canvas_t *);
void moire(enum action, cucul_canvas_t *);
@@ -50,10 +51,32 @@ void (*fn[])(enum action, cucul_canvas_t *) =
#define DEMO_FRAMES 1000
#define TRANSITION_FRAMES 40

#define TRANSITION_COUNT 2
#define TRANSITION_CIRCLE 0
#define TRANSITION_STAR 1


/* Common macros for dither-based demos */
#define XSIZ 256
#define YSIZ 256

#define OFFSET_X(i) (i*2)
#define OFFSET_Y(i) (i*2)+1

float star[] = {
0.000000, -1.000000,
0.308000,-0.349000,
0.992000,-0.244000,
0.500000,0.266000,
0.632000,0.998000,
0.008000,0.659000,
-0.601000,0.995000,
-0.496000,0.275000,
-0.997000,-0.244000,
-0.313000,-0.349000
};


/* Global variables */
static int frame = 0;

@@ -64,6 +87,9 @@ int main(int argc, char **argv)

int demo, next = -1, pause = 0, next_transition = DEMO_FRAMES;
unsigned int i;
int transition = cucul_rand(0, TRANSITION_COUNT);



/* Set up two canvases, a mask, and attach a display to the front one */
frontcv = cucul_create_canvas(0, 0);
@@ -89,7 +115,7 @@ int main(int argc, char **argv)
demo = cucul_rand(0, DEMOS);
fn[demo](INIT, frontcv);

for(;;)
for(;;)
{
/* Handle events */
caca_event_t ev;
@@ -129,7 +155,7 @@ int main(int argc, char **argv)
if(frame == next_transition)
{
next = cucul_rand(0, DEMOS);
if(next == demo)
if(next == demo)
next = (next + 1) % DEMOS;
fn[next](INIT, backcv);
}
@@ -156,15 +182,12 @@ paused:
cucul_set_color(mask, CUCUL_COLOR_LIGHTGRAY, CUCUL_COLOR_BLACK);
cucul_clear_canvas(mask);
cucul_set_color(mask, CUCUL_COLOR_WHITE, CUCUL_COLOR_WHITE);
cucul_fill_ellipse(mask,
cucul_get_canvas_width(mask) / 2,
cucul_get_canvas_height(mask) / 2,
cucul_get_canvas_width(mask) *
(frame - next_transition) / TRANSITION_FRAMES * 3 / 4,
cucul_get_canvas_height(mask) *
(frame - next_transition) / TRANSITION_FRAMES * 3 / 4,
"#");
do_transition(mask,
transition,
(float)(frame - next_transition) / TRANSITION_FRAMES * 3.0f / 4.0f);
cucul_blit(frontcv, 0, 0, backcv, mask);
} else {
transition = cucul_rand(0, TRANSITION_COUNT);
}

cucul_set_color(frontcv, CUCUL_COLOR_WHITE, CUCUL_COLOR_BLUE);
@@ -186,6 +209,75 @@ end:
return 0;
}

/* Transitions */
void do_transition(cucul_canvas_t *mask, int transition, float time)
{
float mulx = time*cucul_get_canvas_width(mask);
float muly = time*cucul_get_canvas_height(mask);
int w2 = cucul_get_canvas_width(mask) / 2;
int h2 = cucul_get_canvas_height(mask) / 2;

switch(transition)
{
case TRANSITION_STAR:
mulx*=1.8;
muly*=1.8;
cucul_fill_triangle(mask,
star[OFFSET_X(0)]*mulx+w2, star[OFFSET_Y(0)]*muly+h2,
star[OFFSET_X(1)]*mulx+w2, star[OFFSET_Y(1)]*muly+h2,
star[OFFSET_X(9)]*mulx+w2, star[OFFSET_Y(9)]*muly+h2,
"#");
cucul_fill_triangle(mask,
star[OFFSET_X(1)]*mulx+w2, star[OFFSET_Y(1)]*muly+h2,
star[OFFSET_X(2)]*mulx+w2, star[OFFSET_Y(2)]*muly+h2,
star[OFFSET_X(3)]*mulx+w2, star[OFFSET_Y(3)]*muly+h2,
"#");
cucul_fill_triangle(mask,
star[OFFSET_X(3)]*mulx+w2, star[OFFSET_Y(3)]*muly+h2,
star[OFFSET_X(4)]*mulx+w2, star[OFFSET_Y(4)]*muly+h2,
star[OFFSET_X(5)]*mulx+w2, star[OFFSET_Y(5)]*muly+h2,
"#");
cucul_fill_triangle(mask,
star[OFFSET_X(5)]*mulx+w2, star[OFFSET_Y(5)]*muly+h2,
star[OFFSET_X(6)]*mulx+w2, star[OFFSET_Y(6)]*muly+h2,
star[OFFSET_X(7)]*mulx+w2, star[OFFSET_Y(7)]*muly+h2,
"#");
cucul_fill_triangle(mask,
star[OFFSET_X(7)]*mulx+w2, star[OFFSET_Y(7)]*muly+h2,
star[OFFSET_X(8)]*mulx+w2, star[OFFSET_Y(8)]*muly+h2,
star[OFFSET_X(9)]*mulx+w2, star[OFFSET_Y(9)]*muly+h2,
"#");
cucul_fill_triangle(mask,
star[OFFSET_X(9)]*mulx+w2, star[OFFSET_Y(9)]*muly+h2,
star[OFFSET_X(1)]*mulx+w2, star[OFFSET_Y(1)]*muly+h2,
star[OFFSET_X(5)]*mulx+w2, star[OFFSET_Y(5)]*muly+h2,
"#");
cucul_fill_triangle(mask,
star[OFFSET_X(9)]*mulx+w2, star[OFFSET_Y(9)]*muly+h2,
star[OFFSET_X(5)]*mulx+w2, star[OFFSET_Y(5)]*muly+h2,
star[OFFSET_X(7)]*mulx+w2, star[OFFSET_Y(7)]*muly+h2,
"#");
cucul_fill_triangle(mask,
star[OFFSET_X(1)]*mulx+w2, star[OFFSET_Y(1)]*muly+h2,
star[OFFSET_X(3)]*mulx+w2, star[OFFSET_Y(3)]*muly+h2,
star[OFFSET_X(5)]*mulx+w2, star[OFFSET_Y(5)]*muly+h2,
"#");
break;

case TRANSITION_CIRCLE:
cucul_fill_ellipse(mask,
w2,
h2,
mulx,
muly,
"#");

break;

}
}


/* The plasma effect */
#define TABLEX (XSIZ * 2)
#define TABLEY (YSIZ * 2)
@@ -620,7 +712,7 @@ void langton(enum action action, cucul_canvas_t *cv)
{
dir[a] = (dir[a] + 3) % 4;
screen[ax[a] + width * ay[a]] = (a << 4) | 0x0f;
}
}
ax[a] = (width + ax[a] + steps[dir[a]][0]) % width;
ay[a] = (height + ay[a] + steps[dir[a]][1]) % height;
}


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