Tweak particle effects

assets/voxygen/shaders/particle-frag.glsl

@@ -86,5 +86,9 @@ void main() {
     vec3 color = surf_color;
 #endif
 
+<<<<<<< HEAD
 	tgt_color = vec4(color, f_col.a);
+=======
+	tgt_color = vec4(color, 1.0);
+>>>>>>> 62119c37a... Tweak particle effects
 }

assets/voxygen/shaders/particle-vert.glsl

@@ -243,13 +243,12 @@ void main() {
 		);
 	} else if (inst_mode == GROUND_SHOCKWAVE) {
 		attr = Attr(
-			linear_motion(
-				vec3(rand0 * 0.25, rand1 * 0.25, 0.0),
-				vec3(rand2 * 0.1, rand3 * 0.1, 0.0)
-			),
-			3.0 + 5.0 * rand5,
-			vec4(vec3(0.42, 0.32, 0.1), 1),
-			spin_in_axis(vec3(rand6, rand7, rand8), rand9 * 3 + lifetime * 5)
+			vec3(0.0),
+			vec3(1.0, 1.0, (3.0 * rand0 * sin(2.0 * lifetime * 3.14 * 2.0))) / 3,
+			//3.0 + 5.0 * rand5,
+			vec4(vec3(0.32 + (rand0 * 0.04), 0.22 + (rand1 * 0.03), 0.05 + (rand2 * 0.01)), 1),
+			//rotationMatrix(vec3(rand6, rand7, rand8), rand9 * 3 + lifetime * 5)
+			spin_in_axis(vec3(1,0,0),0)
 		);
 	} else {
 		attr = Attr(

voxygen/src/scene/particle.rs

@@ -436,27 +436,44 @@ impl ParticleMgr {
         {
             let elapsed = time - shockwave.creation.unwrap_or_default();
 
-            let p = shockwave.properties.speed * elapsed as f32;
+            let distance = shockwave.properties.speed * elapsed as f32;
+
+            let radians = shockwave.properties.angle.to_radians();
 
             let theta = ori.0.y.atan2(ori.0.x);
-            let dtheta = shockwave.properties.angle.to_radians() / p;
+            let dtheta = radians / distance;
+
+            // 1 / 3 the size of terrain voxel
+            let scale = 1.0 / 3.0;
+
+            let freqency_millis = shockwave.properties.speed * scale;
+
+            for heartbeat in 0..self
+                .scheduler
+                .heartbeats(Duration::from_millis(freqency_millis as u64))
+            {
+                let sub_tick_interpolation = freqency_millis * 1000.0 * heartbeat as f32;
+
+                let distance =
+                    shockwave.properties.speed * (elapsed as f32 - sub_tick_interpolation);
+
+                for d in 0..((distance / scale) as i32) {
+                    let arc_position = (theta - (radians / 2.0)) + (dtheta * d as f32 * scale);
+
+                    let position = pos.0
+                        + Vec3::new(
+                            distance * arc_position.cos(),
+                            distance * arc_position.sin(),
+                            0.0,
+                        );
+
+                    let position_snapped = (position / scale).round() * scale;
 
-            for _ in 0..self.scheduler.heartbeats(Duration::from_millis(10)) {
-                for d in 0..(p as i32) {
                     self.particles.push(Particle::new(
                         Duration::from_millis(250),
                         time,
                         ParticleMode::GroundShockwave,
-                        pos.0
-                            + Vec3::new(
-                                p * ((theta - (shockwave.properties.angle.to_radians() / 2.0))
-                                    + (dtheta * d as f32))
-                                    .cos(),
-                                p * ((theta - (shockwave.properties.angle.to_radians() / 2.0))
-                                    + (dtheta * d as f32))
-                                    .sin(),
-                                0.0,
-                            ),
+                        position_snapped,
                     ));
                 }
             }