From b59523c13b28c59f6b3ff5df314dcd073d9a4586 Mon Sep 17 00:00:00 2001
From: Piotrek <pibaj@ciop.pl>
Date: Fri, 23 Apr 2021 16:06:54 +0200
Subject: [PATCH] continue traversing nodes if brick not hit

---
 src/app/camera_controller.rs         |   1 +
 src/main.rs                          |   2 +-
 src/renderer/buffers/brick_buffer.rs |   4 ++--
 src/renderer/buffers/node_buffer.rs  |   4 +++-
 src/renderer/camera.rs               |   6 +++---
 src/shaders/bin/shader.frag.spv      | Bin 9608 -> 10076 bytes
 src/shaders/raycasting.cginc         |  18 ++++++++++--------
 7 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/src/app/camera_controller.rs b/src/app/camera_controller.rs
index 7e6effc..7685f65 100644
--- a/src/app/camera_controller.rs
+++ b/src/app/camera_controller.rs
@@ -41,6 +41,7 @@ impl CameraController {
         let mut movement = CameraMovement::default();
         movement.speed = 2.0;
         let mut rotation = CameraRotation::default();
+        rotation.yaw = 45.0;
         rotation.sensitivity = 0.2;
         Self { enabled: false, movement, rotation }
     }
diff --git a/src/main.rs b/src/main.rs
index 8e46219..2ace7f5 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -58,7 +58,7 @@ fn main() {
 
                 // Display FPS
                 let elapsed = fps_timer.elapsed().as_secs_f64();
-                if elapsed >= 0.5 {
+                if elapsed >= 1.5 {
                     let fps = (fps_counter as f64) / elapsed;
                     println!("FPS: {}", (fps*100.0_f64).floor()/100.0);
                     fps_timer = std::time::Instant::now();
diff --git a/src/renderer/buffers/brick_buffer.rs b/src/renderer/buffers/brick_buffer.rs
index 6c97c81..eec43b3 100644
--- a/src/renderer/buffers/brick_buffer.rs
+++ b/src/renderer/buffers/brick_buffer.rs
@@ -2,7 +2,7 @@ use wgpu::util::DeviceExt;
 use std::convert::TryInto;
 
 const BRICK_SIZE : usize = 32; // 32x32x32 brick size
-const BRICK_NUM : usize = 2; // x bricks in texture
+const BRICK_NUM : usize = 10000; // x bricks in texture
 
 const BRICK_LEN : usize = BRICK_SIZE*BRICK_SIZE*BRICK_SIZE;
 const DATA_LEN : usize = BRICK_LEN * BRICK_NUM;
@@ -102,7 +102,7 @@ impl BrickBuffer {
                 }
             }
         }
-        bricks.set(0, 0, 0, 0, 0);
+        bricks.set(1, 20, 5, 16, 1);
 
         // Done
         Self { bricks, texture, size, bind_layout, bind_group }
diff --git a/src/renderer/buffers/node_buffer.rs b/src/renderer/buffers/node_buffer.rs
index bf24347..7154530 100644
--- a/src/renderer/buffers/node_buffer.rs
+++ b/src/renderer/buffers/node_buffer.rs
@@ -70,7 +70,9 @@ impl NodeBuffer {
 
         // Data
         let mut nodes : [u32; NUM_NODES] = [Default::default(); NUM_NODES];
-        nodes[0] = 2;
+        nodes[0] = 1;
+        nodes[1] = 2;
+        nodes[2] = 2;
 
         // Done
         Self { nodes, texture, size, bind_layout, bind_group }
diff --git a/src/renderer/camera.rs b/src/renderer/camera.rs
index e00f72c..5650760 100644
--- a/src/renderer/camera.rs
+++ b/src/renderer/camera.rs
@@ -1,4 +1,4 @@
-use cgmath::{Point3, Vector3, Matrix4, Deg};
+use cgmath::{Point3, Vector3, Matrix4, Deg, InnerSpace};
 
 pub struct Camera {
     pub position: Point3<f32>,
@@ -14,8 +14,8 @@ impl Camera {
 
     pub fn new(aspect: f32, fov: f32) -> Self {
         Self {
-            position: (0.0, 1.0, 0.0).into(),
-            forward: (0.0, 0.0, 1.0).into(),
+            position: (2.0, 1.0, -1.0).into(),
+            forward: (-0.66, -0.33, 0.66).into(),
             up: Vector3::unit_y(),
             aspect,
             fovy: fov,
diff --git a/src/shaders/bin/shader.frag.spv b/src/shaders/bin/shader.frag.spv
index e828880e448914d7ead4573568031bce12b20612..3e1ad77a868bb3fc910258241e3bda8f5c870a34 100644
GIT binary patch
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diff --git a/src/shaders/raycasting.cginc b/src/shaders/raycasting.cginc
index b0ce775..0bbbbfb 100644
--- a/src/shaders/raycasting.cginc
+++ b/src/shaders/raycasting.cginc
@@ -24,7 +24,7 @@ vec3 solve(vec3 hitPoint, vec3 view, vec3 normal)
 *   dir: Camera view direction (ray direction)
 *   addr: Number given by node, afaik brick offset in brick array
 */
-vec3 castBricks(vec3 origin, vec3 start, vec3 dir, uint addr)
+vec4 castBricks(vec3 origin, vec3 start, vec3 dir, vec3 incAxis, uint addr)
 {
     // Change scale
     origin = start - origin;
@@ -38,7 +38,8 @@ vec3 castBricks(vec3 origin, vec3 start, vec3 dir, uint addr)
     vec3 dist = (pos-origin+0.5 + raySign*0.5) * rayInv;
 
     ivec3 offset = ivec3(0, 0, (addr-1)*32); 
-    vec3 incAxis = vec3(0,0,0);
+
+    vec3 tmp = abs(raySign);
     for(int i=0;i<110;i++)
     {
         // Get brick
@@ -48,11 +49,11 @@ vec3 castBricks(vec3 origin, vec3 start, vec3 dir, uint addr)
             // Hit point
             vec3 mini = (pos-origin+0.5 - raySign*0.5) * rayInv;
             float len = max(mini.x, max(mini.y, mini.z));
-            vec3 hitPoint = (origin + dir * len) + start;
+            vec3 hitPoint = (origin + dir * len) / 32.0;
 
             // Normal vector (negate previous increment axis and mult by sign)
             vec3 normal = -incAxis * raySign;
-            return solve(hitPoint, dir, normal);
+            return vec4(solve(hitPoint, dir, normal), 1.0);
         }
 
         // Get new closest axis to increment
@@ -60,12 +61,12 @@ vec3 castBricks(vec3 origin, vec3 start, vec3 dir, uint addr)
 		dist += incAxis * raySign * rayInv;
         pos += incAxis * raySign;
 
-        // Outside bounds
+        // Check for bounds
         if(pos.x < 0 || pos.y < 0 || pos.z < 0) { break; }
         if(pos.x > 32 || pos.y > 32 || pos.z > 32) { break; }
     }
 
-    return vec3(0.5,0.5,0.5);
+    return vec4(0.5,0.5,0.5, 0.0);
 }
 
 /*
@@ -102,7 +103,8 @@ vec3 castNodes(vec3 origin, vec3 dir)
             //return solve(hitPoint, dir, normal);
             
             // Cast brick
-            return castBricks(pos, hitPoint, dir, node); //todo: continue if not hit
+            vec4 result = castBricks(pos, hitPoint, dir, incAxis, node);
+            if(result.a > 0.0) return result.rgb; //todo: continue if not hit
         }
 
         // Get new closest axis to increment
@@ -111,7 +113,7 @@ vec3 castNodes(vec3 origin, vec3 dir)
         pos += incAxis * raySign;
 
         // Outside bounds
-        // if(pos.x < 0 || pos.y < 0 || pos.z < 0) { break; }
+        //if(pos.x < 0 || pos.y < 0 || pos.z < 0) { break; }
         // if(pos.x > 1 || pos.y > 1 || pos.z > 1) { break; }
     }