diff options
Diffstat (limited to 'src/modules/spiro')
| -rw-r--r-- | src/modules/spiro/spiro.c | 84 |
1 files changed, 62 insertions, 22 deletions
diff --git a/src/modules/spiro/spiro.c b/src/modules/spiro/spiro.c index 684cf03..25670f7 100644 --- a/src/modules/spiro/spiro.c +++ b/src/modules/spiro/spiro.c @@ -7,6 +7,8 @@ #include "til.h" #include "til_fb.h" #include "til_module_context.h" +#include "til_stream.h" +#include "til_tap.h" #include "draw.h" @@ -28,8 +30,55 @@ typedef struct spiro_context_t { int r_dir; float p; int p_dir; + + struct { + til_tap_t l; + til_tap_t k; + til_tap_t rounds; + } taps; + + struct { + float l; + float k; + float rounds; + } vars; + + float *l; + float *k; + float *rounds; } spiro_context_t; +static void spiro_update_taps(spiro_context_t *ctxt, til_stream_t *stream, float dt) +{ + + if (dt > 0.f) { + /* FIXME: these increments should be scaled by a delta-t, + * but at least by filtering on same-tick things don't go + * crazy in multi-drawn context scenarios like checkers::fill_module + */ + /* check bounds and increment r & p */ + float next_r=ctxt->r+(.00001f*ctxt->r_dir); + if(next_r >= 1.f || next_r <= 0.f || next_r <= ctxt->p) + ctxt->r_dir=ctxt->r_dir*-1; + else + ctxt->r=ctxt->r+(.00001f*ctxt->r_dir); + + float next_p=ctxt->p+(.0003f*ctxt->p_dir); + if(next_p >= ctxt->r || next_p <= 0) + ctxt->p_dir=ctxt->p_dir*-1; + else + ctxt->p=ctxt->p+(.0003f*ctxt->p_dir); + } + + if (!til_stream_tap_context(stream, &ctxt->til_module_context, NULL, &ctxt->taps.l)) + *ctxt->l = ctxt->p/ctxt->r; + + if (!til_stream_tap_context(stream, &ctxt->til_module_context, NULL, &ctxt->taps.k)) + *ctxt->k = ctxt->r; + + if (!til_stream_tap_context(stream, &ctxt->til_module_context, NULL, &ctxt->taps.rounds)) + *ctxt->rounds = 128; +} static til_module_context_t * spiro_create_context(const til_module_t *module, til_stream_t *stream, unsigned seed, unsigned ticks, unsigned n_cpus, til_setup_t *setup) { @@ -49,6 +98,12 @@ static til_module_context_t * spiro_create_context(const til_module_t *module, t #ifdef DEBUG printf("spiro: initial context: r=%f, dir=%i, p=%f, dir=%i\n", ctxt->r, ctxt->r_dir, ctxt->p, ctxt->p_dir); #endif + ctxt->taps.l = til_tap_init_float(ctxt, &ctxt->l, 1, &ctxt->vars.l, "l"); + ctxt->taps.k = til_tap_init_float(ctxt, &ctxt->k, 1, &ctxt->vars.k, "k"); + ctxt->taps.rounds = til_tap_init_float(ctxt, &ctxt->rounds, 1, &ctxt->vars.rounds, "rounds"); + + spiro_update_taps(ctxt, stream, 0.f); + return &ctxt->til_module_context; } @@ -59,6 +114,9 @@ static void spiro_render_fragment(til_module_context_t *context, til_stream_t *s int width = fragment->frame_width, height = fragment->frame_height; int display_R, display_origin_x, display_origin_y; + float dt = ((float)(ticks - context->last_ticks)) * .001f; + + spiro_update_taps(ctxt, stream, dt); /* Based on the fragment's dimensions, calculate the origin and radius of the fixed outer circle, C0. */ @@ -77,9 +135,10 @@ static void spiro_render_fragment(til_module_context_t *context, til_stream_t *s til_fb_fragment_clear(fragment); /* plot one spirograph run */ - float l=ctxt->p/ctxt->r; - float k=ctxt->r; - for(float t=0.f; t<128*2*M_PI; t+= M_PI/display_R) { + float l=*ctxt->l; + float k=*ctxt->k; + float incr=M_PI/display_R; + for(float t=0.f; t<*ctxt->rounds*2*M_PI; t+= incr) { float my_x=((1.f-k)*cosf(t))+(l*k*cosf(((1.f-k)/k)*t)); float my_y=((1.f-k)*sinf(t))-(l*k*sinf(((1.f-k)/k)*t)); int pos_x=display_origin_x+(my_x*display_R); @@ -122,25 +181,6 @@ static void spiro_render_fragment(til_module_context_t *context, til_stream_t *s (ctxt->p*display_R), display_origin_y, makergb(0xFF, 0xFF, 0x00, 1)); #endif - if (context->last_ticks != ticks) { - /* FIXME: these increments should be scaled by a delta-t, - * but at least by filtering on same-tick things don't go - * crazy in multi-drawn context scenarios like checkers::fill_module - */ - /* check bounds and increment r & p */ - float next_r=ctxt->r+(.00001f*ctxt->r_dir); - if(next_r >= 1.f || next_r <= 0.f || next_r <= ctxt->p) - ctxt->r_dir=ctxt->r_dir*-1; - else - ctxt->r=ctxt->r+(.00001f*ctxt->r_dir); - - float next_p=ctxt->p+(.0003f*ctxt->p_dir); - if(next_p >= ctxt->r || next_p <= 0) - ctxt->p_dir=ctxt->p_dir*-1; - else - ctxt->p=ctxt->p+(.0003f*ctxt->p_dir); - } - } til_module_t spiro_module = { |