fixed negative distance in voxel traversing

src/renderer/buffers/brick_buffer.rs

@@ -102,6 +102,7 @@ impl BrickBuffer {
                 for z in 0..32 {
                     let value = if rng.gen::<f32>()> 0.99 { 1 } else { 0 };
                     bricks.set(0, x, y, z, value);
+                    bricks.set(1, x, 0, z, 1);
                 }
             }
         }

src/renderer/buffers/node_buffer.rs

@@ -92,20 +92,21 @@ impl NodeBuffer {
         // Data
         let mut nodes = NodeData::new();
 
-        let mut rng = rand::thread_rng();
-        for x in 0..WORLD_SIZE {
-            for y in 0..WORLD_SIZE {
-                for z in 0..WORLD_SIZE {
-                    let value = if rng.gen::<f32>()> 0.5 { 1 } else { 0 };
-                    nodes.set(x, y, z, value);
-                }
-            }
-        }
-        // for i in 0..WORLD_SIZE {
-        //     nodes.set(i, 0, 0, 1);
-        //     nodes.set(0, i, 0, 1);
-        //     nodes.set(0, 0, i, 1);
+        // let mut rng = rand::thread_rng();
+        // for x in 0..WORLD_SIZE {
+        //     for y in 0..WORLD_SIZE {
+        //         for z in 0..WORLD_SIZE {
+        //             let value = if rng.gen::<f32>()> 0.5 { 1 } else { 0 };
+        //             nodes.set(x, y, z, value);
+        //         }
+        //     }
         // }
+        for i in 0..WORLD_SIZE {
+            nodes.set(i, 0, 0, 1);
+            nodes.set(0, i, 0, 1);
+            nodes.set(0, 0, i, 1);
+        }
+        nodes.set(0, 0, 0, 2);
 
         // Done
         Self { nodes, texture, size, bind_layout, bind_group }

src/renderer/buffers/uniform_buffer.rs

@@ -7,7 +7,8 @@ use wgpu::util::DeviceExt;
 pub struct UniformValues {
     view_inv: [[f32; 4]; 4],
     proj_inv: [[f32; 4]; 4],
-    cam_pos: [f32; 3]
+    cam_pos: [f32; 3],
+    time: f32
 }
 
 impl UniformValues {
@@ -16,10 +17,11 @@ impl UniformValues {
         Self::default()
     }
 
-    pub fn update(&mut self, camera: &Camera) {
+    pub fn update(&mut self, camera: &Camera, time: f32) {
         self.view_inv = camera.view_matrix().invert().unwrap().into();
         self.proj_inv = camera.proj_matrix().invert().unwrap().into();
         self.cam_pos = camera.position.into();
+        self.time = time;
     }
 }
 

src/renderer/mod.rs

@@ -16,8 +16,9 @@ pub struct Renderer {
     uniform_buffer: UniformBuffer,
     node_buffer: NodeBuffer,
     brick_buffer: BrickBuffer,
-    // Camera
+    // Other
     pub camera: Camera,
+    start: std::time::Instant
 }
 
 impl Renderer {
@@ -117,9 +118,11 @@ impl Renderer {
         // Pipeline
         let pipeline = Self::create_pipeline(&device, &swapchain_desc, &[&uniform_buffer.bind_layout, &node_buffer.bind_layout, &brick_buffer.bind_layout]);
 
+        let start = std::time::Instant::now();
+
         // Save values in app
         println!("Initialized");
-        Self { surface, device, queue, swapchain_desc, swapchain, pipeline, raster_buffer, uniform_buffer, node_buffer, brick_buffer, camera }
+        Self { surface, device, queue, swapchain_desc, swapchain, pipeline, raster_buffer, uniform_buffer, node_buffer, brick_buffer, camera, start }
     }
 
     pub fn resize(&mut self, new_size: Option<PhysicalSize<u32>>) {
@@ -139,7 +142,7 @@ impl Renderer {
     pub fn render(&mut self) -> Result<(), wgpu::SwapChainError> {
 
         // Update uniform buffer
-        self.uniform_buffer.values.update(&self.camera);
+        self.uniform_buffer.values.update(&self.camera, self.start.elapsed().as_secs_f32());
         self.queue.write_buffer(&self.uniform_buffer.buffer, 0, bytemuck::cast_slice(&[self.uniform_buffer.values]));
 
         // Get next frame to render to

src/shaders/raycasting.cginc

@@ -26,6 +26,8 @@ vec3 solve(vec3 hitPoint, vec3 view, vec3 normal)
 */
 vec4 castBricks(vec3 origin, vec3 start, vec3 dir, vec3 incAxis, uint addr)
 {
+    vec3 o = origin;
+
     // Change scale
     origin = start - origin;
     origin += dir*0.00001;
@@ -49,7 +51,7 @@ vec4 castBricks(vec3 origin, vec3 start, vec3 dir, vec3 incAxis, 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) / 32.0;
+            vec3 hitPoint = (origin + dir * len) / 32.0 + o;
 
             // Normal vector (negate previous increment axis and mult by sign)
             vec3 normal = -incAxis * raySign;
@@ -96,7 +98,7 @@ vec3 castNodes(vec3 origin, vec3 dir)
         {
             // Hit point
             vec3 mini = (pos-origin+0.5 - raySign*0.5) * rayInv;
-            float len = max(mini.x, max(mini.y, mini.z));
+            float len = max(0.0, max(mini.x, max(mini.y, mini.z)));
             vec3 hitPoint = origin + dir * len;
             // Normal vector (negate previous increment axis and mult by sign)
             //vec3 normal = -incAxis * raySign;
@@ -104,7 +106,7 @@ vec3 castNodes(vec3 origin, vec3 dir)
             
             // Cast brick
             vec4 result = castBricks(pos, hitPoint, dir, incAxis, node);
-            if(result.a > 0.0) return result.rgb; //todo: continue if not hit
+            if(result.a > 0.0) return result.rgb;
         }
 
         // Get new closest axis to increment

src/shaders/shader.frag

@@ -7,9 +7,10 @@ layout(location=0) out vec4 out_color;
 
 layout(set=0, binding=0) uniform Uniforms 
 {
-    mat4 view_matrix;
-    mat4 proj_matrix_inv;
-    vec3 cam_pos;
+    mat4 _viewMatrix;
+    mat4 _projMatrixInv;
+    vec3 _CamPos;
+    float _Time;
 };
 
 //layout(set = 1, binding = 0) uniform texture3D node_tex;
@@ -30,9 +31,9 @@ layout(set=2,binding=0) uniform usampler3D bricksTexture;
 void main() 
 {
     // Calculate ray direction
-    vec3 view_dir = (proj_matrix_inv * vec4(vert_uv, 0, 1)).xyz;
-    vec3 ray_dir = normalize(view_matrix * vec4(view_dir,0)).xyz;
+    vec3 view_dir = (_projMatrixInv * vec4(vert_uv, 0, 1)).xyz;
+    vec3 ray_dir = normalize(_viewMatrix * vec4(view_dir,0)).xyz;
 
     // Raycast
-    out_color = vec4(castNodes(cam_pos, ray_dir), 1.0);
+    out_color = vec4(castNodes(_CamPos, ray_dir), 1.0);
 }