From c05aa71f402abb3b0f05a40fa61e6159cf87ebd6 Mon Sep 17 00:00:00 2001
From: brett weiland <brettsweiland@gmail.com>
Date: Sat, 1 Jun 2024 16:58:25 -0500
Subject: project is dead

---
 src/camera.cu | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/camera.cu

(limited to 'src/camera.cu')

diff --git a/src/camera.cu b/src/camera.cu
new file mode 100644
index 0000000..da527b9
--- /dev/null
+++ b/src/camera.cu
@@ -0,0 +1,44 @@
+#include <limits>
+#include "camera.cuh"
+
+__device__ void Camera::render(Scene scene, uint8_t *image) {
+  const uint3 unnormalized_uv = ((blockDim * blockIdx) + threadIdx);
+  const unsigned int img_index = (unnormalized_uv.x + (unnormalized_uv.y * blockDim.x * gridDim.x)) * 4;
+  const vect3 uv = ((2 * make_vect3(unnormalized_uv)) / make_vect3(gridDim * blockDim)) - 1;
+  Ray ray;
+  ray.direction = normalize(make_vect3(uv.x, uv.y, 1));
+  Render_object **objects = scene.get_objects();
+  Render_object *closest_obj;
+  T total_dist = 0;
+  Color pcolor;
+  for(int steps = 0; steps < max_steps; steps++) {
+    T min_dist = T_MAX;
+    T dist;
+    ray.start = this->pos_ + (total_dist * ray.direction);
+    for(size_t obj_i = 0; objects[obj_i] != nullptr; obj_i++) {
+
+      dist = objects[obj_i]->distance_estimator(ray.start);
+      if(dist < min_dist) {
+        min_dist = dist;
+        if(dist < clip_min) {
+          steps = max_steps;
+          pcolor = objects[obj_i]->get_color(ray);
+          image[img_index+3] = 0xff;
+          break;
+        }
+        if(dist > clip_max) {
+          steps = max_steps;
+          image[img_index+3] = 0x00;
+          break;
+        }
+      }
+    }
+    total_dist += min_dist;
+  }
+
+
+  //TODO gamma space
+  image[img_index] = pcolor.x * 255;
+  image[img_index+1] = pcolor.y * 255;
+  image[img_index+2] = pcolor.z * 255;
+}
-- 
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