usually works. need to figure out what causes it to not to sometimes.

util/grid/camera.hpp

@@ -0,0 +1,61 @@
+#ifndef camera_hpp
+#define camera_hpp
+
+#include <unordered_map>
+#include <fstream>
+#include <cstring>
+#include <memory>
+#include <array>
+#include "../vectorlogic/vec2.hpp"
+#include "../vectorlogic/vec3.hpp"
+#include "../vectorlogic/vec4.hpp"
+#include "../timing_decorator.hpp"
+#include "../output/frame.hpp"
+#include "../noise/pnoise2.hpp"
+#include "../vecmat/mat4.hpp"
+#include "../vecmat/mat3.hpp"
+#include <vector>
+#include <algorithm>
+#include "../basicdefines.hpp"
+#include <cfloat> 
+
+struct Camera {
+    Ray3f posfor;
+    Vec3f up;
+    float fov;
+    Camera(Vec3f pos, Vec3f viewdir, Vec3f up, float fov = 80) : posfor(Ray3f(pos, viewdir)), up(up), fov(fov) {}
+    
+    void rotateYaw(float angle) {
+        float cosA = cos(angle);
+        float sinA = sin(angle);
+        
+        Vec3f right = posfor.direction.cross(up).normalized();
+        posfor.direction = posfor.direction * cosA + right * sinA;
+        posfor.direction = posfor.direction.normalized();
+    }
+    
+    void rotatePitch(float angle) {
+        float cosA = cos(angle);
+        float sinA = sin(angle);
+        
+        Vec3f right = posfor.direction.cross(up).normalized();
+        posfor.direction = posfor.direction * cosA + up * sinA;
+        posfor.direction = posfor.direction.normalized();
+        
+        up = right.cross(posfor.direction).normalized();
+    }
+
+    Vec3f forward() const {
+        return (posfor.direction - posfor.origin).normalized();
+    }
+
+    Vec3f right() const {
+        return forward().cross(up).normalized();
+    }
+
+    float fovRad() const {
+        return fov * (M_PI / 180);
+    }
+};
+
+#endif