improve background animation

Makefile

@@ -111,10 +111,10 @@ MAIN_OBJS = \
 	src/collision2.o \
 	src/update.o \
 	src/unparse.o \
-	src/color.o \
 	$(patsubst %.glsl,%.glsl.o,$(wildcard src/shader/*.glsl)) \
 	$(patsubst %.data,%.data.o,$(wildcard src/level/*.data)) \
 	$(patsubst %.data,%.data.o,$(wildcard src/font/*.data)) \
+	$(patsubst %.data,%.data.o,$(wildcard src/texture/*.data)) \
 	$(patsubst %.data.pal,%.data.pal.o,$(wildcard src/level/*.data.pal)) \
 	$(GLFW)
 

include/color.hpp

@@ -1,5 +0,0 @@
-#pragma once
-
-#include "math/float_types.hpp"
-
-vec3 hsv_to_rgb(float h, float s, float v);

include/render.hpp

@@ -49,7 +49,10 @@ extern "C" {
                          uint attrib_position,
                          uint uniform_resolution,
                          uint uniform_trans,
+                         uint uniform_texture1,
                          uint uniform_time,
+                         uint uniform_palette,
+                         uint uniform_aspect,
                          struct game_state * state);
 
   void render_paddle(struct mesh paddle_mesh,

include/state.h

@@ -36,6 +36,7 @@ extern "C" {
     double start_time;
     double time;
     double remaining;
+    double time_bg;
 
     bool intro_shown;
   };

include/texture/noise.data.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern uint32_t _binary_src_texture_noise_data_start __asm("_binary_src_texture_noise_data_start");
+extern uint32_t _binary_src_texture_noise_data_end __asm("_binary_src_texture_noise_data_end");
+extern uint32_t _binary_src_texture_noise_data_size __asm("_binary_src_texture_noise_data_size");
+
+#define src_texture_noise_data_start ((const char *)&_binary_src_texture_noise_data_start)
+#define src_texture_noise_data_end ((const char *)&_binary_src_texture_noise_data_end)
+#define src_texture_noise_data_size (src_texture_noise_data_end - src_texture_noise_data_start)
+
+#ifdef __cplusplus
+}
+#endif

src/color.cpp

@@ -1,26 +0,0 @@
-#include "color.hpp"
-
-vec3 hsv_to_rgb(float h, float s, float v)
-{
-  if (s == 0.0)
-    return vec3(v, v, v);
-  int i = h * 6.0f;
-  float f = (h * 6.0f) - i;
-  float p = v * (1.0f - s);
-  float q = v * (1.0f - s * f);
-  float t = v * (1.0f - s * (1.0f - f));
-  i = i % 6;
-  if (i == 0)
-    return vec3(v, t, p);
-  if (i == 1)
-    return vec3(q, v, p);
-  if (i == 2)
-    return vec3(p, v, t);
-  if (i == 3)
-    return vec3(p, q, v);
-  if (i == 4)
-    return vec3(t, p, v);
-  if (i == 5)
-    return vec3(v, p, q);
-  return vec3(0, 0, 0);
-}

src/main.c

@@ -17,6 +17,7 @@
 #include "shader/block.fp.glsl.h"
 
 #include "font/ter_u32n.data.h"
+#include "texture/noise.data.h"
 
 #include "opengl.h"
 #include "render.hpp"
@@ -187,7 +188,10 @@ int main()
   uint bg__attrib_position = glGetAttribLocation(bg_program, "position");
   uint bg__uniform_resolution = glGetUniformLocation(bg_program, "resolution");
   uint bg__uniform_trans = glGetUniformLocation(bg_program, "trans");
+  uint bg__uniform_texture1 = glGetUniformLocation(bg_program, "texture1");
   uint bg__uniform_time = glGetUniformLocation(bg_program, "time");
+  uint bg__uniform_palette = glGetUniformLocation(bg_program, "palette");
+  uint bg__uniform_aspect = glGetUniformLocation(bg_program, "aspect");
 
   // paddle
 
@@ -207,6 +211,7 @@ int main()
   // textures
   //////////////////////////////////////////////////////////////////////
 
+  glActiveTexture(GL_TEXTURE0);
   uint terminus_font = make_texture(src_font_ter_u32n_data_start,
                                     GL_RED,
                                     256,
@@ -214,6 +219,14 @@ int main()
                                     GL_RED);
   (void)terminus_font;
 
+  glActiveTexture(GL_TEXTURE1);
+  uint noise_texture = make_texture(src_texture_noise_data_start,
+                                    GL_RGBA,
+                                    256,
+                                    256,
+                                    GL_RGBA);
+  (void)noise_texture;
+
   //////////////////////////////////////////////////////////////////////
   // main loop
   //////////////////////////////////////////////////////////////////////
@@ -318,7 +331,10 @@ int main()
                       bg__attrib_position,
                       bg__uniform_resolution,
                       bg__uniform_trans,
+                      bg__uniform_texture1,
                       bg__uniform_time,
+                      bg__uniform_palette,
+                      bg__uniform_aspect,
                       &state);
 
     glEnable(GL_BLEND);

src/opengl.c

@@ -78,11 +78,10 @@ int make_texture(const void * data,
 {
   unsigned int texture;
   glGenTextures(1, &texture);
-  glActiveTexture(GL_TEXTURE0);
 
   glBindTexture(GL_TEXTURE_2D, texture);
-  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
-  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 

src/render.cpp

@@ -6,7 +6,6 @@
 
 #include "unparse.h"
 #include "render.hpp"
-#include "color.hpp"
 #include "math/float_types.hpp"
 #include "math/transform.hpp"
 
@@ -190,6 +189,13 @@ void render_blocks(mesh block_mesh,
   }
 }
 
+vec3 sample_palette(float d, vec3 p) {
+  vec3 v = vec3(d, d, d) + p;
+  v = v * vec3(6.28318548202514648438f) ;
+  v = vec3(cos(v.x), cos(v.y), cos(v.z));
+  return vec3(0.5, 0.5, 0.5) * v + vec3(0.5, 0.5, 0.5); // 48
+}
+
 void render_balls(mesh ball_mesh,
                   uint attrib_position,
                   uint attrib_texture,
@@ -249,14 +255,7 @@ void render_balls(mesh ball_mesh,
     vec4 base_color = vec4(0.5f, 0.5f, 0.5f, 1.0f);
     if (ball.super_ball) {
       float hue = state->time - ball.launch_time;
-      hue = hue - floorf(hue);
-      vec3 c = hsv_to_rgb(hue, 1.0f, 1.0f);
-      base_color = vec4(c.x, c.y, c.z, 1.0f);
-    } else if (0) {
-      float hue = sin(ball.launch_time) * 0.5 - 0.5;
-      hue = hue - floorf(hue);
-      vec3 c = hsv_to_rgb(hue, 1.0f, 1.0f);
-      base_color = vec4(c.x, c.y, c.z, 1.0f) * 0.5f;
+      base_color = sample_palette(hue, vec3(0, 0.33, 0.67));
     }
 
     glUniform4fv(uniform_trans, 4, &trans[0][0]);
@@ -307,9 +306,10 @@ void render_text(struct mesh plane_mesh,
                  mat4x4 s,
                  mat4x4 r,
                  float _scale,
-                 int h_advance,
+                 int h_advance_init,
                  int v_advance)
 {
+  int h_advance = h_advance_init;
   for (int i = 0; i < text_length; i++) {
     const char * txt = text[i];
     while (*txt) {
@@ -330,7 +330,7 @@ void render_text(struct mesh plane_mesh,
       h_advance += grid_width;
     }
     v_advance += grid_height;
-    h_advance = 0;
+    h_advance = h_advance_init;
   }
 }
 
@@ -388,7 +388,7 @@ void render_font(struct mesh plane_mesh,
   const int intro_length = (sizeof (intro)) / (sizeof (intro[0]));
 
   const char * loss[] = {
-    "You were not successful.",
+    "You were not prepared.",
     "Press option to retry.",
   };
   const int loss_length = (sizeof (loss)) / (sizeof (loss[0]));
@@ -411,7 +411,7 @@ void render_font(struct mesh plane_mesh,
                 aspect,
                 a, s, r,
                 text_scale,
-                0, 0);
+                -grid_width * 3, 0);
   } else if (state->remaining <= 0) {
     if (state->level_ix == 0) {
       vec3 base_color = vec3(1, 0.1, 0.1);
@@ -533,7 +533,10 @@ void render_background(struct mesh plane_mesh,
                        uint attrib_position,
                        uint uniform_resolution,
                        uint uniform_trans,
+                       uint uniform_texture1,
                        uint uniform_time,
+                       uint uniform_palette,
+                       uint uniform_aspect,
                        struct game_state * state)
 {
   glBindBuffer(GL_ARRAY_BUFFER, plane_mesh.vtx);
@@ -552,14 +555,24 @@ void render_background(struct mesh plane_mesh,
   mat4x4 trans = r;
   glUniform4fv(uniform_trans, 4, &trans[0][0]);
 
-  if (state->balls_launched == 0 || state->remaining <= 0.0) {
-    glUniform1f(uniform_time, 0);
-  } else {
-    glUniform1f(uniform_time, state->time);
-  }
+  glUniform1i(uniform_texture1, 1);
+
+  glUniform1f(uniform_time, state->time_bg);
   vec2 resolution = vec2(vp_width, vp_height);
   glUniform2fv(uniform_resolution, 1, &resolution[0]);
 
+  const vec3 palettes[5] = {
+    vec3(0.440f, 0.021f, 0.512f),
+    vec3(0.131f, 0.958f, 0.678f),
+    vec3(0.507f, 0.407f, 0.103f),
+    vec3(0.709f, 0.240f, 0.475f),
+    vec3(0.658f, 0.944f, 0.719f),
+  };
+  glUniform3fv(uniform_palette, 1, &palettes[state->level_ix % 5][0]);
+
+  float aspect = (float)vp_height / (float)vp_width;
+  glUniform1f(uniform_aspect, aspect);
+
   glDrawElements(GL_TRIANGLES, plane_mesh.length, GL_UNSIGNED_INT, 0);
 }
 

src/shader/background.fp.glsl

@@ -1,11 +1,17 @@
 #version 120
 
+uniform sampler2D texture1;
+
 varying vec2 fp_uv;
 
 uniform float time;
 
-vec3 palette(float d) {
-  vec3 v = d + vec3(0.25, 0.40625, 0.5625); // 40 45 49
+uniform vec3 palette;
+
+uniform float aspect;
+
+vec3 sample_palette(float d, vec3 p) {
+  vec3 v = d + p;
   v = v * 6.28318548202514648438;
   v = cos(v);
   return vec3(0.5, 0.5, 0.5) * v + vec3(0.5, 0.5, 0.5); // 48
@@ -13,9 +19,31 @@ vec3 palette(float d) {
 
 void main()
 {
-  vec2 uv = fp_uv;
-  float d = length(uv);
-  float td = time * 0.5 + d;
+  vec2 tc = vec2(fp_uv.x * aspect, fp_uv.y) * 0.5 + 0.5;
+  vec4 c = texture2D(texture1, tc);
 
-  gl_FragColor = vec4(palette(td) * 0.1, 1);
+  vec2 bc = fp_uv * 0.5 + 0.5;
+
+  if (bc.x > 0.95 || bc.x < 0.05 ||
+      bc.y > 1.0 || bc.y < 0.0) {
+    vec2 uv = fp_uv;
+    float d = length(uv);
+    float st = sin(time * 0.05);
+    float td = time * st * 0.5 + d;
+
+    vec3 cc = mix(c.xyz, c.zyx, sin(time) * 0.5 + 0.5);
+    gl_FragColor = vec4(sample_palette(td, palette) * cc, 1);
+  } else {
+    float noise_0 = mix(c.x, c.y, sin(time) * 0.5 + 0.5);
+    float noise_1 = mix(c.z, c.w, cos(time) * 0.5 + 0.5);
+
+    vec2 uv = vec2(sin(fp_uv.x + time + noise_0),
+                   cos(fp_uv.y + time + noise_1));
+    float d = length(uv);
+    float td = time * 0.5 + d;
+
+    gl_FragColor = vec4(sample_palette(td, palette) * 0.1, 1);
+  }
+
+  //gl_FragColor = vec4(noise * noise);
 }

src/update.cpp

@@ -239,6 +239,10 @@ void update(struct game_state * state, double time)
     state->start_time = time;
   }
 
+  double dt = time - state->time;
   state->time = time;
+  if (!(state->balls_launched == 0 || state->remaining <= 0.0)) {
+    state->time_bg += dt;
+  }
   state->remaining = 20.0 - (time - state->start_time);
 }