From b0dd97ee6bf8d5daa587da40ad941efac68152df Mon Sep 17 00:00:00 2001
From: brett weiland <brettsweiland@gmail.com>
Date: Sat, 1 Jun 2024 01:36:18 -0500
Subject: got raycasting laid out

---
 src/camera.cuh | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 src/camera.cuh

(limited to 'src/camera.cuh')

diff --git a/src/camera.cuh b/src/camera.cuh
new file mode 100644
index 0000000..4d04fcd
--- /dev/null
+++ b/src/camera.cuh
@@ -0,0 +1,75 @@
+#ifndef CAMERA_H
+#define CAMERA_H
+
+#include "entity.cuh"
+#include "common.cuh"
+#include <limits>
+
+
+//template <class T> class scene;
+
+//I am soooo high lol
+class camera : public entity {
+  public:
+    __device__ camera(scene *pscene, const T fov = 1, const vect3 pos = make_vect3(0), const vect3 rot = make_vect3(0)) 
+      : pscene(pscene), fov(fov), entity(pos, rot, make_vect3(0)) {};
+  private:
+    T fov;
+    float2 size;
+    int steps = 100;
+    T clip_min = .1;
+    T clip_max = 100;
+    //scene *pscene;
+};
+
+/**
+//later we'll make scenes objects, rn im lazy (TODO)
+template <class T> __device__ void camera::render() {
+  //TODO *really* need to clean this up once you get further
+  //extra dimentions is extra math
+  //either generisize float3 or stop using this fucking template nonsense
+  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;
+  const vect3 ray_direction = normalize(make_vect3(uv.x, uv.y, 1));
+  T dist;
+  T total_dist = 0;
+  vect3 ray;
+  int i;
+
+
+  //if(img_index == 640) { printf("%f, %f, %f\n", uv.x, uv.y, uv.z); }
+
+  T min_dist = clip_max;
+
+  render_object **objs = pscene->get_objs();
+  for(i = 0; i < steps; i++) {
+    ray = this->pos_ + (total_dist * ray_direction);
+    //gyagh memory lookups
+    for(unsigned int oi = 0; objs[oi] != NULL; oi++) {
+      dist = object.distance_estimator(ray);
+    }
+    if((dist < clip_min)) {
+      //image[img_index] = 0xff;
+      break;
+    }
+    if((dist > clip_max)) {
+      //image[img_index+2] = 0xff;
+      break;
+    }
+    total_dist += dist;
+  }
+
+
+
+  
+  //image[img_index] = 0x00;
+  //image[img_index+1] = 0x00;
+  //image[img_index+2] = p;
+  //image[img_index+3] = 0xff;
+  
+}
+**/
+
+
+#endif
-- 
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