Implement spot lights and directional lights

examples/testbed/src/free_fly_camera.rs

@@ -12,6 +12,7 @@ use lyra_engine::{
 #[derive(Clone, Component)]
 pub struct FreeFlyCamera {
     pub speed: f32,
+    pub slow_speed_factor: f32,
     pub look_speed: f32,
     pub mouse_sensitivity: f32,
     pub look_with_keys: bool,
@@ -21,6 +22,7 @@ impl Default for FreeFlyCamera {
     fn default() -> Self {
         Self {
             speed: 4.0,
+            slow_speed_factor: 0.25,
             look_speed: 0.09,
             mouse_sensitivity: 0.4,
             look_with_keys: false,
@@ -29,9 +31,10 @@ impl Default for FreeFlyCamera {
 }
 
 impl FreeFlyCamera {
-    pub fn new(speed: f32, look_speed: f32, mouse_sensitivity: f32, look_with_keys: bool) -> Self {
+    pub fn new(speed: f32, slow_speed_factor: f32, look_speed: f32, mouse_sensitivity: f32, look_with_keys: bool) -> Self {
         Self {
             speed,
+            slow_speed_factor,
             look_speed,
             mouse_sensitivity,
             look_with_keys,
@@ -117,7 +120,13 @@ impl SimpleSystem for FreeFlyCameraPlugin {
                 }
 
                 if velocity != Vec3::ZERO {
-                    cam.transform.translation += velocity.normalize() * fly.speed * delta_time;
+                    let temp = if keys.is_pressed(KeyCode::E) {
+                        fly.speed * delta_time * fly.slow_speed_factor
+                    } else {
+                        fly.speed * delta_time
+                    };
+
+                    cam.transform.translation += velocity.normalize() * temp;
                 }
             }
 

examples/testbed/src/main.rs

@@ -1,4 +1,4 @@
-use lyra_engine::{math::{self, Vec3}, ecs::{World, components::{transform::TransformComponent, camera::CameraComponent, model::ModelComponent, DeltaTime}, EventQueue, SimpleSystem, Component, Criteria, CriteriaSchedule, BatchedSystem}, math::Transform, input::{KeyCode, InputButtons, MouseMotion, ActionHandler, Layout, Action, ActionKind, LayoutId, ActionMapping, Binding, ActionSource, ActionMappingId, InputActionPlugin, ActionState}, game::Game, plugin::Plugin, render::{window::{CursorGrabMode, WindowOptions}, light::PointLight}, change_tracker::Ct};
+use lyra_engine::{math::{self, Vec3}, ecs::{World, components::{transform::TransformComponent, camera::CameraComponent, model::ModelComponent, DeltaTime}, EventQueue, SimpleSystem, Component, Criteria, CriteriaSchedule, BatchedSystem}, math::Transform, input::{KeyCode, InputButtons, MouseMotion, ActionHandler, Layout, Action, ActionKind, LayoutId, ActionMapping, Binding, ActionSource, ActionMappingId, InputActionPlugin, ActionState}, game::Game, plugin::Plugin, render::{window::{CursorGrabMode, WindowOptions}, light::{PointLight, directional::DirectionalLight, SpotLight}}, change_tracker::Ct};
 use lyra_engine::assets::{ResourceManager, Model};
 
 mod free_fly_camera;
@@ -77,65 +77,106 @@ async fn main() {
         let crate_model = resman.request::<Model>("assets/crate/crate.gltf").unwrap();
         drop(resman);
 
-        /* world.spawn((
-            ModelComponent(cube_model.clone()),
-            TransformComponent::from(Transform::from_xyz(3.0, 0.5, -2.2)),
-        )); */
-
         world.spawn((
             ModelComponent(antique_camera_model),
             TransformComponent::from(Transform::from_xyz(0.0, -5.0, -10.0)),
         ));
 
-        /* let light = PointLight {
-            color: Vec3::new(1.0, 1.0, 1.0),
-            position: Vec3::new(0.0, -5.0, -8.0),
-            constant: 1.0,
-            linear: 0.09,
-            quadratic: 0.032,
-        };
-        world.spawn((light,)); */
-        let mut cube_tran = Transform::from_xyz(-3.5, 0.0, -7.0);
-        cube_tran.rotate_y(math::Angle::Degrees(180.0));
-        world.spawn((
-            /* PointLight {
-                color: Vec3::new(1.0, 1.0, 1.0),
-                intensity: 1.0,
-                constant: 1.0,
-                linear: 0.045,
-                quadratic: 0.0075,
-            }, */
-            TransformComponent::from(cube_tran),
-            ModelComponent(crate_model.clone()),
-            CubeFlag,
-        ));
+        {
+            let mut cube_tran = Transform::from_xyz(-3.5, 0.0, -8.0);
+            //cube_tran.rotate_y(math::Angle::Degrees(180.0));
+            world.spawn((
+                TransformComponent::from(cube_tran),
+                ModelComponent(crate_model.clone()),
+                CubeFlag,
+            ));
+        }
 
-        let mut light_tran = Transform::from_xyz(1.5, 2.5, -8.5);
-        light_tran.scale = Vec3::new(0.5, 0.5, 0.5);
-        world.spawn((
-            PointLight {
-                color: Vec3::new(1.0, 1.0, 1.0), //Vec3::new(0.361, 0.984, 0.0),
-                intensity: 1.2,
-                /* constant: 1.0,
-                linear: 0.045,
-                quadratic: 0.0075, */
+        {
+            let mut light_tran = Transform::from_xyz(1.5, 2.5, 0.0);
+            light_tran.scale = Vec3::new(0.5, 0.5, 0.5);
+            light_tran.rotate_x(math::Angle::Degrees(-45.0));
+            light_tran.rotate_y(math::Angle::Degrees(25.0));
+            world.spawn((
+                DirectionalLight {
+                    color: Vec3::new(1.0, 1.0, 1.0),
+                    ambient: 0.3,
+                    diffuse: 1.0,
+                    specular: 1.3,
+                },
+                TransformComponent::from(light_tran),
+                ModelComponent(cube_model.clone()),
+            ));
+        }
 
-                constant: 1.0,
-                linear: 0.09,
-                quadratic: 0.032,
+        {
+            let mut light_tran = Transform::from_xyz(-3.5, 0.2, -4.5);
+            light_tran.scale = Vec3::new(0.5, 0.5, 0.5);
+            world.spawn((
+                SpotLight {
+                    color: Vec3::new(1.0, 0.2, 0.2),
+                    cutoff: math::Angle::Degrees(12.5),
+                    outer_cutoff: math::Angle::Degrees(17.5),
 
-                ambient: 0.3,
-                diffuse: 1.0,
-                specular: 1.3,
-            },
-            TransformComponent::from(light_tran),
-            ModelComponent(cube_model),
-        ));
+                    constant: 1.0,
+                    linear: 0.007,
+                    quadratic: 0.0002,
+
+                    ambient: 0.0,
+                    diffuse: 7.0,
+                    specular: 1.0,
+                },
+                TransformComponent::from(light_tran),
+                ModelComponent(cube_model.clone()),
+            ));
+        }
+        
+        /* {
+            let mut light_tran = Transform::from_xyz(-5.0, 2.5, -9.5);
+            light_tran.scale = Vec3::new(0.5, 0.5, 0.5);
+            world.spawn((
+                PointLight {
+                    color: Vec3::new(1.0, 1.0, 1.0),
+
+                    intensity: 1.0,
+
+                    constant: 1.0,
+                    linear: 0.045,
+                    quadratic: 0.0075,
+                    
+                    ambient: 0.1,
+                    diffuse: 1.0,
+                    specular: 1.3,
+                },
+                TransformComponent::from(light_tran),
+                ModelComponent(cube_model.clone()),
+            ));
+        } */
+
+        {
+            let mut light_tran = Transform::from_xyz(2.0, 2.5, -9.5);
+            light_tran.scale = Vec3::new(0.5, 0.5, 0.5);
+            world.spawn((
+                PointLight {
+                    color: Vec3::new(0.0, 0.0, 1.0),
+
+                    intensity: 3.3,
+
+                    constant: 1.0,
+                    linear: 0.09,
+                    quadratic: 0.032,
+                    
+                    ambient: 0.2,
+                    diffuse: 1.0,
+                    specular: 1.3,
+                },
+                TransformComponent::from(light_tran),
+                ModelComponent(cube_model),
+            ));
+        }
 
         let mut camera = CameraComponent::new_3d();
-        camera.transform.translation += math::Vec3::new(0.0, 0.0, 7.5);
-        //camera.transform.rotate_y(Angle::Degrees(-25.0));
-        //camera.transform.rotate_z(math::Angle::Degrees(-90.0));
+        camera.transform.translation += math::Vec3::new(0.0, 0.0, 5.5);
         world.spawn(( camera, FreeFlyCamera::default() ));
 
         Ok(())
@@ -156,7 +197,7 @@ async fn main() {
     };
 
     let spin_system = |world: &mut World| -> anyhow::Result<()> {
-        const SPEED: f32 = 7.0;
+        const SPEED: f32 = 4.0;
         let delta_time = **world.get_resource::<DeltaTime>().unwrap();
 
         for (transform, _) in world.query_mut::<(&mut TransformComponent, &CubeFlag)>().iter_mut() {
@@ -164,6 +205,11 @@ async fn main() {
             t.rotate_y(math::Angle::Degrees(SPEED * delta_time));
         }
 
+        /* for (transform, s) in world.query_mut::<(&mut TransformComponent, &mut SpotLight)>().iter_mut() {
+            let t = &mut transform.transform;
+            t.rotate_x(math::Angle::Degrees(SPEED * delta_time));
+        } */
+
         Ok(())
     };
 

src/math/angle.rs

@@ -10,7 +10,7 @@ pub fn radians_to_degrees(radians: f32) -> f32 {
     radians * 180.0 / PI
 }
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub enum Angle {
     Degrees(f32),
     Radians(f32),
@@ -35,3 +35,37 @@ impl Angle {
         }
     }
 }
+
+impl std::ops::Add for Angle {
+    type Output = Angle;
+
+    fn add(self, rhs: Self) -> Self::Output {
+        Angle::Radians(self.to_radians() + rhs.to_radians())
+    }
+}
+
+impl std::ops::AddAssign for Angle {
+    fn add_assign(&mut self, rhs: Self) {
+        match self {
+            Angle::Degrees(d) => *d += rhs.to_degrees(),
+            Angle::Radians(r) => *r += rhs.to_radians(),
+        }
+    }
+}
+
+impl std::ops::Sub for Angle {
+    type Output = Angle;
+
+    fn sub(self, rhs: Self) -> Self::Output {
+        Angle::Radians(self.to_radians() - rhs.to_radians())
+    }
+}
+
+impl std::ops::SubAssign for Angle {
+    fn sub_assign(&mut self, rhs: Self) {
+        match self {
+            Angle::Degrees(d) => *d -= rhs.to_degrees(),
+            Angle::Radians(r) => *r -= rhs.to_radians(),
+        }
+    }
+}

src/render/light/directional.rs

@@ -1,10 +1,9 @@
-#[repr(C)]
-#[derive(Default, Debug, Copy, Clone, edict::Component)]
+#[derive(Default, Debug, Clone, edict::Component)]
 pub struct DirectionalLight {
-    pub direction: glam::Quat,
+    //pub direction: glam::Quat,
     pub color: glam::Vec3,
 
-    pub ambient: glam::Vec3,
-    pub diffuse: glam::Vec3,
-    pub specular: glam::Vec3,
+    pub ambient: f32,
+    pub diffuse: f32,
+    pub specular: f32,
 }

src/render/light/mod.rs

@@ -1,19 +1,27 @@
 pub mod point;
 pub mod directional;
+pub mod spotlight;
+
+pub use point::*;
+pub use directional::*;
+pub use spotlight::*;
 
 use std::{collections::{VecDeque, HashMap}, num::{NonZeroU64, NonZeroU32}, marker::PhantomData};
 
 use edict::query::EpochOf;
 pub use point::*;
-use tracing::debug;
+use tracing::{debug, Instrument};
 use wgpu::util::DeviceExt;
 
 use std::mem;
 
 use crate::{math::Transform, ecs::components::TransformComponent};
 
+use self::directional::DirectionalLight;
+
 const MAX_LIGHT_COUNT: usize = 16;
 
+/// A struct that stores a list of lights in a wgpu::Buffer.
 pub struct LightBuffer<U: Default + bytemuck::Pod + bytemuck::Zeroable> {
     _phantom: PhantomData<U>,
     /// The max amount of light casters that could fit in this buffer.
@@ -102,15 +110,16 @@ pub struct LightUniformBuffers {
     pub bindgroup: wgpu::BindGroup,
     pub lights_uniform: LightsUniform,
     pub point_lights: LightBuffer<PointLightUniform>,
+    pub spot_lights: LightBuffer<SpotLightUniform>,
 }
 
 impl LightUniformBuffers {
     pub fn new(device: &wgpu::Device) -> Self {
         let buffer = device.create_buffer(
             &wgpu::BufferDescriptor {
-                label: Some("UB_Lights"),
+                label: Some("UBO_Lights"),
                 usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
-                size: (mem::size_of::<LightsUniform>() * MAX_LIGHT_COUNT) as u64,
+                size: mem::size_of::<LightsUniform>() as u64,
                 mapped_at_creation: false,
             }
         );
@@ -149,6 +158,7 @@ impl LightUniformBuffers {
         });
 
         let point_lights = LightBuffer::new(&bindgroup_layout, MAX_LIGHT_COUNT);
+        let spot_lights = LightBuffer::new(&bindgroup_layout, MAX_LIGHT_COUNT);
 
         Self {
             buffer,
@@ -156,6 +166,7 @@ impl LightUniformBuffers {
             bindgroup,
             lights_uniform: LightsUniform::default(),
             point_lights,
+            spot_lights,
         }
     }
 
@@ -166,10 +177,29 @@ impl LightUniformBuffers {
             if !self.point_lights.has_light(entity) || light_epoch == world_epoch || transform_epoch == world_epoch {
                 let uniform = PointLightUniform::from_bundle(point_light, &transform.transform);
                 self.point_lights.update_or_add(&mut self.lights_uniform.point_lights, entity, uniform);
+                debug!("Updated point light");
             }
         }
 
+        for (entity, spot_light, transform, light_epoch, transform_epoch)
+                in world.query::<(edict::Entities, &SpotLight, &TransformComponent, EpochOf<SpotLight>, EpochOf<TransformComponent>)>().iter() {
+
+            if !self.spot_lights.has_light(entity) || light_epoch == world_epoch || transform_epoch == world_epoch {
+                let uniform = SpotLightUniform::from_bundle(spot_light, &transform.transform);
+                self.spot_lights.update_or_add(&mut self.lights_uniform.spot_lights, entity, uniform);
+                //debug!("Updated spot light");
+            }
+        }
+
+        if let Some((dir_light, transform)) = 
+                world.query::<(&DirectionalLight, &TransformComponent)>().iter().next() {
+            
+            let uniform = DirectionalLightUniform::from_bundle(dir_light, &transform.transform);
+            self.lights_uniform.directional_light = uniform;
+        }
+
         self.lights_uniform.point_light_count = self.point_lights.buffer_count as u32;
+        self.lights_uniform.spot_light_count = self.spot_lights.buffer_count as u32;
         queue.write_buffer(&self.buffer, 0, bytemuck::cast_slice(&[self.lights_uniform]));
     }
 }
@@ -180,6 +210,10 @@ pub struct LightsUniform {
     point_lights: [PointLightUniform; MAX_LIGHT_COUNT],
     point_light_count: u32,
     _padding: [u32; 3],
+    spot_lights: [SpotLightUniform; MAX_LIGHT_COUNT],
+    spot_light_count: u32,
+    _padding2: [u32; 3],
+    directional_light: DirectionalLightUniform,
 }
 
 #[repr(C)]
@@ -188,17 +222,22 @@ pub struct PointLightUniform {
     /// The position of the light
     /// vec4 is used here for gpu padding, w is ignored in the shader
     pub position: glam::Vec4,
+    
     /// The color of the light
     /// vec4 is used here for gpu padding, w is ignored in the shader
     pub color: glam::Vec4,
+
     /// The intensity of the light
     /// This works by just multiplying the result of the lighting
     /// calculations by this scalar
     pub intensity: f32,
+
     /// The constant used in the quadratic attenuation calculation. Its best to leave this at 1.0
     pub constant: f32,
+
     /// The linear factor used in the quadratic attenuation calculation.
     pub linear: f32,
+
     /// The quadratic factor used in the quadratic attenuation calculation.
     pub quadratic: f32,
 
@@ -230,3 +269,92 @@ impl PointLightUniform {
         }
     }
 }
+
+#[repr(C)]
+#[derive(Default, Debug, Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct DirectionalLightUniform {
+    /// The direction of the light
+    pub direction: glam::Vec3,
+    // gpu padding
+    pub _padding: u32,
+    /// The color of the light
+    pub color: glam::Vec3,
+    // no padding is needed here since ambient acts as the padding
+    // that would usually be needed for the vec3
+
+    /// The scalar of the ambient light created by this caster.
+    pub ambient: f32,
+    /// The scalar of the diffuse light created by this caster.
+    pub diffuse: f32,
+    /// The scalar of the specular reflections created by this caster.
+    pub specular: f32,
+
+    pub _padding2: [u32; 2],
+}
+
+impl DirectionalLightUniform {
+    /// Create the DirectionalLightUniform from an ECS bundle
+    pub fn from_bundle(light: &DirectionalLight, transform: &Transform) -> Self {
+        //transform.forward()
+        Self {
+            direction: transform.forward(),
+            _padding: 0,
+            color: light.color,
+            ambient: light.ambient,
+            diffuse: light.diffuse,
+            specular: light.specular,
+            _padding2: [0; 2],
+        }
+    }
+}
+
+#[repr(C)]
+#[derive(Default, Debug, Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
+struct SpotLightUniform {
+    pub position: glam::Vec3,
+    pub _padding: u32,
+    pub direction: glam::Vec3,
+    pub _padding2: u32,
+    pub color: glam::Vec3,
+    // no padding is needed here since cutoff acts as the padding
+    // that would usually be needed for the vec3
+
+    pub cutoff: f32,
+    pub outer_cutoff: f32,
+
+    /// The constant used in the quadratic attenuation calculation. Its best to leave this at 1.0
+    pub constant: f32,
+
+    /// The linear factor used in the quadratic attenuation calculation.
+    pub linear: f32,
+
+    /// The quadratic factor used in the quadratic attenuation calculation.
+    pub quadratic: f32,
+
+    pub ambient: f32,
+    pub diffuse: f32,
+    pub specular: f32,
+    pub _padding3: u32,
+}
+
+impl SpotLightUniform {
+    /// Create the SpotLightUniform from an ECS bundle
+    pub fn from_bundle(light: &SpotLight, transform: &Transform) -> Self {
+        Self {
+            position: transform.translation,
+            _padding: 0,
+            direction: transform.forward(),
+            _padding2: 0,
+            color: light.color,
+            cutoff: light.cutoff.to_radians().cos(),
+            outer_cutoff: light.outer_cutoff.to_radians().cos(),
+            constant: light.constant,
+            linear: light.linear,
+            quadratic: light.quadratic,
+            ambient: light.ambient,
+            diffuse: light.diffuse,
+            specular: light.specular,
+            _padding3: 0,
+        }
+    }
+}

src/render/light/point.rs

@@ -1,5 +1,4 @@
-#[repr(C)]
-#[derive(Default, Debug, Copy, Clone, edict::Component)]
+#[derive(Default, Debug, Clone, edict::Component)]
 pub struct PointLight {
     pub color: glam::Vec3,
     pub intensity: f32,

src/render/light/spotlight.rs

@@ -0,0 +1,16 @@
+use crate::math;
+
+#[derive(Debug, Clone, edict::Component)]
+pub struct SpotLight {
+    pub color: glam::Vec3,
+    pub cutoff: math::Angle,
+    pub outer_cutoff: math::Angle,
+
+    pub constant: f32,
+    pub linear: f32,
+    pub quadratic: f32,
+
+    pub ambient: f32,
+    pub diffuse: f32,
+    pub specular: f32,
+}

src/render/shaders/base.wgsl

@@ -40,9 +40,38 @@ struct PointLight {
     specular: f32,
 };
 
+struct DirectionalLight {
+    direction: vec3<f32>,
+    color: vec3<f32>,
+    
+    ambient: f32,
+    diffuse: f32,
+    specular: f32,
+};
+
+struct SpotLight {
+    position: vec3<f32>,
+    direction: vec3<f32>,
+    color: vec3<f32>,
+    
+    cutoff: f32,
+    outer_cutoff: f32,
+
+    constant: f32,
+    linear: f32,
+    quadratic: f32,
+
+    ambient: f32,
+    diffuse: f32,
+    specular: f32,
+};
+
 struct Lights {
     point_lights: array<PointLight, max_light_count>,
     point_light_count: u32,
+    spot_lights: array<SpotLight, max_light_count>,
+    spot_light_count: u32,
+    directional_light: DirectionalLight,
 }
 
 @group(1) @binding(0)
@@ -110,22 +139,59 @@ fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
     let object_color: vec4<f32> = textureSample(t_diffuse, s_diffuse, in.tex_coords);
     let specular_color: vec3<f32> = textureSample(t_specular, s_specular, in.tex_coords).xyz;
 
-    var light_res = vec3<f32>(0.0);
+    // this needs to be 0.0 for the math
+    //u_lights.directional_light.direction.w = 0.0;
+
+    var light_res = blinn_phong_dir_light(in.world_position, in.world_normal, u_lights.directional_light, u_material, specular_color);
+
     for (var i = 0u; i < u_lights.point_light_count; i++) {
         light_res += blinn_phong_point_light(in.world_position, in.world_normal, u_lights.point_lights[i], u_material, specular_color);
     }
+
+    for (var i = 0u; i < u_lights.spot_light_count; i++) {
+        light_res += blinn_phong_spot_light(in.world_position, in.world_normal, u_lights.spot_lights[i], u_material, specular_color);
+    }
+
     let light_object_res = light_res * (object_color.xyz/* * u_material.diffuse.xyz*/);
 
     return vec4<f32>(light_object_res, object_color.a);
 }
 
+fn blinn_phong_dir_light(world_pos: vec3<f32>, world_norm: vec3<f32>, dir_light: DirectionalLight, material: Material, specular_factor: vec3<f32>) -> vec3<f32> {
+    let light_color = dir_light.color.xyz;
+    let camera_view_pos = u_camera.view_pos.xyz;
+
+    //// Ambient light ////
+    var ambient_color = light_color * material.ambient.xyz * material.diffuse.xyz;
+
+    //// diffuse ////
+    let light_dir = normalize(-dir_light.direction);
+
+    let diffuse_strength = max(dot(world_norm, light_dir), 0.0);
+    var diffuse_color = light_color * (diffuse_strength * material.diffuse.xyz);
+    //// end of diffuse ////
+
+    //// specular ////
+    let view_dir = normalize(camera_view_pos - world_pos);
+    let half_dir = normalize(view_dir + light_dir);
+
+    let specular_strength = pow(max(dot(world_norm, half_dir), 0.0), material.shininess);
+    var specular_color = specular_strength * (light_color * specular_factor);
+    //// end of specular ////
+    
+    ambient_color *= dir_light.ambient;
+    diffuse_color *= dir_light.diffuse;
+    specular_color *= dir_light.specular;
+
+    return ambient_color + diffuse_color + specular_color;
+}
+
 fn blinn_phong_point_light(world_pos: vec3<f32>, world_norm: vec3<f32>, point_light: PointLight, material: Material, specular_factor: vec3<f32>) -> vec3<f32> {
     let light_color = point_light.color.xyz;
     let light_pos = point_light.position.xyz;
     let camera_view_pos = u_camera.view_pos.xyz;
 
-    // We don't need (or want) much ambient light, so 0.1 is fine
-    //let ambient_strength = 0.1;
+    //// Ambient light ////
     var ambient_color = light_color * material.ambient.xyz * material.diffuse.xyz;
 
     //// diffuse ////
@@ -146,18 +212,69 @@ fn blinn_phong_point_light(world_pos: vec3<f32>, world_norm: vec3<f32>, point_li
     //// end of specular ////
 
     //// point light attenuation ////
-    /*let distance = length(light_pos - world_pos);
+    let distance = length(light_pos - world_pos);
     let attenuation = 1.0 / (point_light.constant + point_light.linear * distance + 
-    	point_light.quadratic * (distance * distance));*/
+    	point_light.quadratic * (distance * distance));
 
     //ambient_color *= attenuation * point_light.intensity * point_light.ambient;
     //diffuse_color *= attenuation * point_light.intensity * point_light.diffuse;
     //specular_color *= attenuation * point_light.intensity * point_light.specular;
     //// end of point light attenuation ////
     
-    ambient_color *= point_light.ambient;
-    diffuse_color *= point_light.diffuse;
-    specular_color *= point_light.specular;
+    ambient_color *= point_light.ambient * attenuation;
+    diffuse_color *= point_light.diffuse * attenuation;
+    specular_color *= point_light.specular * attenuation;
 
-    return (ambient_color + diffuse_color + specular_color) * /*attenuation * */ point_light.intensity;
+    return (ambient_color + diffuse_color + specular_color) * point_light.intensity;
+}
+
+fn blinn_phong_spot_light(world_pos: vec3<f32>, world_norm: vec3<f32>, spot_light: SpotLight, material: Material, specular_factor: vec3<f32>) -> vec3<f32> {
+    let light_color = spot_light.color;//.xyz;
+    let light_pos = spot_light.position.xyz;
+    let camera_view_pos = u_camera.view_pos.xyz;
+
+    let light_dir = normalize(spot_light.position - world_pos);
+    
+    
+    //if (theta > spot_light.cutoff) {
+        var ambient_color = light_color * material.ambient.xyz * material.diffuse.xyz;
+
+        //// diffuse ////
+        //let light_dir = normalize(light_pos - world_pos);
+
+        let diffuse_strength = max(dot(world_norm, light_dir), 0.0);
+        var diffuse_color = light_color * (diffuse_strength * material.diffuse.xyz);
+        //// end of diffuse ////
+
+        //// specular ////
+        let view_dir = normalize(camera_view_pos - world_pos);
+        let half_dir = normalize(view_dir + light_dir);
+
+        let specular_strength = pow(max(dot(world_norm, half_dir), 0.0), material.shininess);
+        var specular_color = specular_strength * (light_color * specular_factor);
+        //// end of specular ////
+        
+        //// spot light soft edges ////
+        let theta = dot(light_dir, normalize(-spot_light.direction));
+        let epsilon = spot_light.cutoff - spot_light.outer_cutoff;
+        let intensity = clamp((theta - spot_light.outer_cutoff) / epsilon, 0.0, 1.0);
+        //diffuse_color *= intensity;
+        //specular_color *= intensity;
+        //// end of spot light soft edges ////
+
+        //// spot light attenuation ////
+        let distance = length(light_pos - world_pos);
+        let attenuation = 1.0 / (spot_light.constant + spot_light.linear * distance + 
+            spot_light.quadratic * (distance * distance));
+
+        ambient_color *= attenuation * intensity * spot_light.ambient;
+        diffuse_color *= attenuation * intensity * spot_light.diffuse;
+        specular_color *= attenuation * intensity * spot_light.specular;
+        //// end of spot light attenuation ////
+
+
+        return /*ambient_color +*/ diffuse_color + specular_color;
+    /*} else {
+        return vec3<f32>(0.0);
+    }*/
 }