feat: arrow keys to control bpm/cycle

DEVELOPMENT.md

@@ -119,7 +119,7 @@ make -f Makefile.dev release-arch
   - [x] Find and fix opengl errors 0500 ?
 - [ ] Extra features
   - [x] `--auto-random-cycle=4`
-  - [ ] Arrows (up-down: bpm / left-right: cycle)
+  - [x] Arrows (up-down: bpm / left-right: cycle)
   - [ ] Save states (numkey: load / shift + numkey: save)
   - [ ] Configurable key codes
   - [ ] Key codes as inputs

README.md

@@ -157,11 +157,15 @@ make install
 
 When running, the following hotkeys are available:
 
-* <kbd>Esc</kbd>: Exit window
+| Hotkey | Function |
-* <kbd>R</kbd>: Randomize internal values
+| ------ | -------- |
-* <kbd>0</kbd>: Reset internal values to 0
+| <kbd>Esc</kbd> | Exit FORGE | 
-* <kbd>D</kbd>: Demo mode On/Off
+| <kbd>R</kbd> | Randomize internal values |
-* <kbd>A</kbd>: Auto Random mode On/Off
+| <kbd>Shift</kbd> + <kbd>R</kbd> | Reset internal values to 0 |
+| <kbd>D</kbd> | Demo mode On/Off | 
+| <kbd>A</kbd> | Auto Random mode On/Off |
+| <kbd>&larr;</kbd> / <kbd>&rarr;</kbd> | Auto Random Cycle -/+ 1 |
+| <kbd>&uarr;</kbd> / <kbd>&darr;</kbd> | BPM +/- 1 |
 
 ### CLI arguments
 

default/forge_project.cfg

@@ -37,6 +37,8 @@ UNIFORM_IN_FPS_PREFIX=iInputFPS
 UNIFORM_DEMO=iDemo
 # 0/1 if auto random
 UNIFORM_AUTORAND=iAutoRand
+# auto random cycle length
+UNIFORM_AUTORANDCYCLE=iAutoRandCycle
 # Current page
 UNIFORM_PAGE=iPage
 # Current selected shader

default/inc_cp437.glsl

@@ -372,6 +372,20 @@ float write_int(vec2 uv, vec2 pos, uint value, uint magnitude)
     return d;
 }
 
+float write_int_left(vec2 uv, vec2 pos, uint value, uint magnitude)
+{
+    int i;
+    uint m = 1;
+    float d = 0;
+    for (i = 0; i < magnitude; i++) {
+        if (i == 0 || value >= m) {
+            pos.x += 1;
+            m *= 10u;
+        }
+    }
+    return write_int(uv, pos, value, magnitude);
+}
+
 int read(sampler2D tex, vec2 uv, float k, int d, float t)
 {
     float inv_k = 1 / k;

default/inc_debug.glsl

@@ -15,6 +15,7 @@ uniform int iInputFormat2;
 
 uniform int iDemo;
 uniform int iAutoRand;
+uniform int iAutoRandCycle;
 uniform int iPage;
 uniform int iSelected;
 
@@ -225,22 +226,22 @@ vec4 debug(vec2 vUV)
     float x = 0;
 
     x = -15;
-    f += write_5(uv3, vec2(x,13), texts[0]);
+    f += write_5(uv3, vec2(x - 4,13), texts[0]);
-    f += write_int(uv3, vec2(x - 3.5,13), iFPS, 3);
+    f += write_int(uv3, vec2(x + 1, 13), iFPS, 3);
     v = min(1, iFPS/60.0);
     f += h_rect(uv3, vec2(x, 12), vec2(4, 0.5), 0.2);
     f += rect(uv3, vec2(x + 4 * v - 4, 12), vec2(4 * v, 0.4));
     
     x = 0;
-    f += write_5(uv3, vec2(x,13), texts[1]);
+    f += write_5(uv3, vec2(x - 4,13), texts[1]);
-    f += write_int(uv3, vec2(x - 3.5,13), int(iTempo), 3);
+    f += write_int(uv3, vec2(x + 1,13), int(iTempo), 3);
     v = fract(iBeats);
     f += h_rect(uv3, vec2(x, 12), vec2(4, 0.5), 0.2);
     f += rect(uv3, vec2(x + 4 * v - 4, 12), vec2(4 * v, 0.4));
 
     x = 15;
-    f += write_5(uv3, vec2(x,13), texts[2]);
+    f += write_5(uv3, vec2(x - 4,13), texts[2]);
-    f += write_int(uv3, vec2(x - 5.5,13), int(iTime), 5);
+    f += write_int(uv3, vec2(x - 1,13), int(iTime), 5);
     v = fract(iTime);
     f += h_rect(uv3, vec2(x, 12), vec2(4, 0.5), 0.2);
     f += rect(uv3, vec2(x + 4 * v - 4, 12), vec2(4 * v, 0.4));
@@ -248,6 +249,7 @@ vec4 debug(vec2 vUV)
     if (iAutoRand > 0) {
         f += write_5(uv3, vec2(-4,-15), iDemo > 0 ? texts[3] : texts[4]);
         f += write_5(uv3, vec2(0,-15), texts[5]);
+        f += write_int_left(uv3, vec2(3, -15), iAutoRandCycle, 3);
     } else {
         f += write_5(uv3, vec2(-2,-15), iDemo > 0 ? texts[3] : texts[4]);
     }

sample/forge_project.cfg

@@ -33,8 +33,6 @@ UNIFORM_BEATS=iBeats
 UNIFORM_FPS=iFPS
 # 0/1 if demo
 UNIFORM_DEMO=iDemo
-# 0/1 if auto random
-UNIFORM_AUTORAND=iAutoRand
 # Seed for shader X
 UNIFORM_SEED_PREFIX=iSeed
 

sample/frag1.glsl

@@ -10,7 +10,6 @@ uniform float iTempo; // current tempo in bpm
 uniform float iBeats; // elapsed beats since last tempo reset
 uniform int iFPS; // output window frames per seconds
 uniform int iDemo; // 0/1 if demo mode
-uniform int iAutoRand; // 0/1 if auto random mode
 uniform int iSeed1; // a random seed assigned at start
 uniform vec2 iResolution; // output window resolution in pixels
 uniform vec3 iMidi1_1[20]; // all midi inputs defined

src/args.c

@@ -127,7 +127,7 @@ void args_parse(Parameters *params, int argc, char **argv) {
   params->base_tempo = 60.0f;
   params->demo = false;
   params->auto_random = false;
-  params->auto_random_cycles = 4;
+  params->auto_random_cycle = 4;
   params->video_in.length = 0;
   params->video_size = 0;
   params->internal_size = 720;
@@ -173,8 +173,8 @@ void args_parse(Parameters *params, int argc, char **argv) {
     } else if (is_arg(arg, "-nar") || is_arg(arg, "--no-auto-random")) {
       params->auto_random = false;
     } else if (is_arg(arg, "-arc") || is_arg(arg, "--auto-random-cycle")) {
-      params->auto_random_cycles = parse_uint(arg, value);
+      params->auto_random_cycle = parse_uint(arg, value);
-      if (params->auto_random_cycles == 0) {
+      if (params->auto_random_cycle == 0) {
         invalid_value(arg, value);
       }
     } else if (is_arg(arg, "-v") || is_arg(arg, "--video-in")) {

src/forge.c

@@ -59,7 +59,7 @@ static void compute_fps(bool trace_fps) {
 
 static void init_context(const Parameters *params, unsigned int in_count) {
   state_init(context, &project.state_config, params->demo, params->auto_random,
-             params->auto_random_cycles, params->base_tempo, params->state_file,
+             params->auto_random_cycle, params->base_tempo, params->state_file,
              params->load_state);
 
   context->monitor = params->monitor;

src/shaders.c

@@ -280,6 +280,9 @@ static void init_single_program(ShaderProgram *program, unsigned int i,
   program->iautorand_locations[i] = glGetUniformLocation(
       program->programs[i],
       config_file_get_str(config, "UNIFORM_AUTORAND", "iAutoRand"));
+  program->iautorandcycle_locations[i] = glGetUniformLocation(
+      program->programs[i],
+      config_file_get_str(config, "UNIFORM_AUTORANDCYCLE", "iAutoRandCycle"));
   program->ipage_locations[i] = glGetUniformLocation(
       program->programs[i],
       config_file_get_str(config, "UNIFORM_PAGE", "iPage"));
@@ -545,6 +548,8 @@ static void use_program(const ShaderProgram *program, int i, bool output,
   write_uniform_1i(program->idemo_locations[i], context->demo ? 1 : 0);
   write_uniform_1i(program->iautorand_locations[i],
                    context->auto_random ? 1 : 0);
+  write_uniform_1i(program->iautorandcycle_locations[i],
+                   context->auto_random_cycle);
   write_uniform_1i(program->ipage_locations[i], context->page);
   write_uniform_1i(program->iselected_locations[i], context->selected + 1);
   write_uniform_2f(program->ires_locations[i], &context->resolution);

src/state.c

@@ -301,6 +301,26 @@ void state_key_event(SharedContext *context, const StateConfig *state_config,
     log_info(
         (context->auto_random ? "[A] Auto Random OFF" : "[A] Auto Random ON"));
     context->auto_random = !context->auto_random;
+  } else if (code == 263) {
+    // LEFT ARROW
+    if (context->auto_random_cycle > 1) {
+      context->auto_random_cycle -= 1;
+    }
+    log_info("[LEFT] Auto Random Cycle: %d", context->auto_random_cycle);
+  } else if (code == 262) {
+    // RIGHT ARROW
+    context->auto_random_cycle += 1;
+    log_info("[RIGHT] Auto Random Cycle: %d", context->auto_random_cycle);
+  } else if (code == 265) {
+    // UP ARROW
+    tempo_set(&context->tempo, context->tempo.tempo + 1);
+    log_info("[UP] Tempo: %f", context->tempo);
+  } else if (code == 264) {
+    // DOWN ARROW
+    if (context->tempo.tempo > 0) {
+      tempo_set(&context->tempo, context->tempo.tempo - 1);
+    }
+    log_info("[DOWN] Tempo: %f", context->tempo);
   } else {
     log_info("[%d] No hotkey defined", code);
   }
@@ -353,7 +373,7 @@ bool state_background_write(SharedContext *context,
     last_active = beat_active;
 
     change = tempo_progress(&context->tempo,
-                            (double)context->auto_random_cycles) < 0.5;
+                            (double)context->auto_random_cycle) < 0.5;
 
     if (context->auto_random && change && !last_change) {
       state_randomize(context, state_config);
@@ -416,7 +436,7 @@ void state_init(SharedContext *context, const StateConfig *state_config,
   tempo_set(&context->tempo, base_tempo);
   context->demo = demo;
   context->auto_random = auto_random;
-  context->auto_random_cycles = auto_random_cycles;
+  context->auto_random_cycle = auto_random_cycles;
 
   context->state.length = state_config->select_frag_codes.length;
   memset(context->state.values, 0, sizeof(context->state.values));

src/tempo.c

@@ -99,8 +99,17 @@ static void add_tap_to_chain(Tempo *tempo, long t) {
 }
 
 void tempo_set(Tempo *tempo, float value) {
+  long t;
+  long progress;
+
+  t = now();
+
+  progress = (t - tempo->last_reset) % tempo->beat_length;
+
   tempo->tempo = value;
   tempo->beat_length = 60000.0 / value;
+
+  reset_tap_chain(tempo, t - progress);
 }
 
 void tempo_tap(Tempo *tempo) {

src/types.h

@@ -43,7 +43,7 @@ typedef struct Parameters {
   float base_tempo;
   bool demo;
   bool auto_random;
-  unsigned int auto_random_cycles;
+  unsigned int auto_random_cycle;
   StringArray video_in;
   unsigned int video_size;
   unsigned int internal_size;
@@ -105,6 +105,7 @@ typedef struct ShaderProgram {
   GLuint iinfps_locations[ARRAY_SIZE];
   GLuint idemo_locations[ARRAY_SIZE];
   GLuint iautorand_locations[ARRAY_SIZE];
+  GLuint iautorandcycle_locations[ARRAY_SIZE];
   GLuint iseed_locations[ARRAY_SIZE];
   GLuint istate_locations[ARRAY_SIZE];
   GLuint ipage_locations[ARRAY_SIZE];
@@ -183,7 +184,7 @@ typedef struct SharedContext {
   vec3 values[ARRAY_SIZE];
   bool demo;
   bool auto_random;
-  unsigned int auto_random_cycles;
+  unsigned int auto_random_cycle;
   unsigned int seeds[MAX_FRAG];
   bool monitor;