Everyone is on fire temporarily.

assets/enemies.json

@@ -47,7 +47,7 @@
         "foreground": [205, 164, 246],
         "background": [30, 20, 75]
       },
-      {"_type": "Combat", "hp": 200, "max_hp": 200, "damage": 20, "dead": false},
+      {"_type": "Combat", "hp": 50, "max_hp": 50, "damage": 2, "dead": false},
       {"_type": "Motion", "dx": 0, "dy": 0, "random": false},
       {"_type": "EnemyConfig", "ai_script": "Enemy::actions", "ai_start_name": "Enemy::initial_state", "ai_goal_name": "Enemy::final_state"},
       {"_type": "Personality", "hearing_distance": 5, "tough": false},

assets/shaders.json

@@ -7,8 +7,12 @@
     "file_name": "assets/shaders/ui_error.frag",
     "type": "fragment"
   },
-  "rayview_sprites": {
+  "flame": {
     "file_name": "assets/shaders/rayview_sprites.frag",
     "type": "fragment"
+  },
+  "rayview_sprites": {
+    "file_name": "assets/shaders/flame_trash.frag",
+    "type": "fragment"
   }
 }

assets/shaders/flame_trash.frag

@@ -0,0 +1,77 @@
+uniform vec2 u_resolution;
+uniform float u_time;
+uniform sampler2D texture;
+uniform float u_mouse;
+uniform float value = 0.2;
+
+float random (in vec2 st) {
+    return fract(sin(dot(st.xy,
+                         vec2(12.9898,78.233)))*
+        43758.5453123);
+}
+
+float noise(in vec2 st) {
+  vec2 i = floor(st);
+  vec2 f = fract(st);
+
+  float a = random(i);
+  float b = random(i + vec2(1.0, 0.0));
+  float c = random(i + vec2(0.0, 1.0));
+  float d = random(i + vec2(1.0, 1.0));
+
+  vec2 u = f * f * (3.0 - 2.0 * f);
+
+  return mix(a, b, u.x) +
+    (c - a) * u.y * (1.0 - u.x) +
+    (d - b) * u.x * u.y;
+}
+
+float fbm(in vec2 st, int octaves=8) {
+  float v = 0.0;
+  float a = 0.5;
+  vec2 shift = vec2(100.0);
+  mat2 rot = mat2(cos(0.5), sin(0.5),
+      -sin(0.5), cos(0.5));
+
+  for(int i = 0; i < octaves; i++) {
+    v += a * noise(st);
+    st = rot * st * 2.0 + shift;
+    a *= 0.5;
+  }
+
+  return v;
+}
+
+void main() {
+  vec2 st = gl_FragCoord.xy/u_resolution.xy * 3.0;
+  vec3 color = vec3(0.0);
+
+  float speed = u_time * 10.0;
+  float value = cos(u_time) * cos(u_time);
+
+  vec2 q = vec2(0.0);
+  q.x = fbm(st + 0.00 * speed);
+  q.y = fbm(st + vec2(1.0));
+
+  vec2 r = vec2(0,0);
+  r.x += fbm( st + 1.0*q + vec2(1.0, 0.0)+ 0.15* speed );
+  r.y += fbm( st + 1.0*q + vec2(-1.0, 0.0)+ 0.126* speed);
+
+  float f = fbm(st * r);
+
+  color = mix(vec3(0.666667,0.619608, 0.122777),
+                vec3(0.666667,0.666667,0.498039),
+                clamp((f*f)*4.0,0.0,1.0));
+
+  color = mix(color,
+       vec3(0.666667, 0.122222, 0.0666667),
+       clamp(length(r.x), 0.0, 1.0));
+
+  color *= (f*f*f+0.5*f*f+0.6*f) * value;
+
+  vec4 pixel = texture2D(texture, gl_TexCoord[0].xy);
+
+  float mask = color.r * pixel.a;
+
+  gl_FragColor = gl_Color * vec4(color, pixel.a) + pixel;
+}

raycaster.cpp

@@ -173,6 +173,11 @@ void Raycaster::sprite_casting(sf::RenderTarget &target) {
       float level = lights[sprite_pos.location.y][sprite_pos.location.x] * PERCENT;
       if(rec.second == aiming_at) level += 0.2;
       $brightness->setUniform("darkness", level);
+
+      $brightness->setUniform("u_time", $clock.getElapsedTime().asSeconds());
+      sf::Vector2f sprite_size{(float)sprite_width, (float)sprite_height};
+      $brightness->setUniform("u_resolution", sprite_size);
+
       target.draw(*sf_sprite, $brightness.get());
     }
   }

tools/fragviewer.cpp

@@ -9,6 +9,8 @@
 #include <fmt/core.h>
 #include <unistd.h>
 
+bool SHADER_RELOAD = true;
+
 void Handle_events(sf::RenderWindow &window) {
   // is this a main event loop
   while (const auto event = window.pollEvent()) {
@@ -16,8 +18,8 @@ void Handle_events(sf::RenderWindow &window) {
       window.close();
     } else if(const auto* key = event->getIf<sf::Event::KeyPressed>()) {
       using KEY = sf::Keyboard::Scan;
-      if(key->scancode == KEY::Escape) {
-        window.close();
+      if(key->scancode == KEY::Escape || key->scancode == KEY::Space) {
+        SHADER_RELOAD = true;
       }
     }
   }
@@ -75,9 +77,6 @@ int main(int argc, char *argv[]) {
   window.setFramerateLimit(60);
   window.setVerticalSyncEnabled(true);
 
-  bool good_shader = shader.loadFromFile(frag_name, sf::Shader::Type::Fragment);
-  dbc::check(good_shader, fmt::format("failed to load shader {}", frag_name));
-
   if(load_sprite) {
     sprite_texture = textures::get(sprite_name);
     sprite_texture.sprite->setPosition({0,0});
@@ -89,13 +88,23 @@ int main(int argc, char *argv[]) {
   } else {
     rect.setPosition({0,0});
     rect.setSize(u_resolution);
-    rect.setFillColor({255, 0, 0, 255});
   }
 
-  shader.setUniform("u_resolution", u_resolution);
 
   while(window.isOpen()) {
     Handle_events(window);
+
+    if(SHADER_RELOAD) {
+      bool good_shader = shader.loadFromFile(frag_name, sf::Shader::Type::Fragment);
+
+      if(!good_shader) {
+        fmt::print("!!!!!! failed to load shader {}\n", frag_name);
+      }
+
+      shader.setUniform("u_resolution", u_resolution);
+      SHADER_RELOAD = false;
+    }
+
     sf::Time u_time = clock.getElapsedTime();
     sf::Vector2i mouse_at = sf::Mouse::getPosition(window);
     sf::Vector2f u_mouse{float(mouse_at.x), float(mouse_at.y)};