--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/scene.h	Thu Oct 25 16:40:22 2007 +0200
@@ -0,0 +1,135 @@
+/*
+ * C++ RayTracer
+ * file: scene.h
+ *
+ * Radek Brich, 2006
+ */
+
+#ifndef SCENE_H
+#define SCENE_H
+
+#include <vector>
+
+#include "noise.h"
+
+#include "vector.h"
+
+using namespace std;
+
+class Ray
+{
+public:
+	Vector3 a, dir;
+	Ray(const Vector3 &aa, const Vector3 &adir):
+		a(aa), dir(adir) {};
+};
+
+class Light
+{
+public:
+	Vector3 pos;
+	Colour colour;
+	int shadows;
+
+	Light(const Vector3 &position, const Colour &acolour):
+		pos(position), colour(acolour), shadows(1) {};
+	void castshadows(bool ashadows) { shadows = ashadows; };
+};
+
+class Texture
+{
+public:
+	Colour colour;
+	Colour evaluate(Vector3 point)
+	{
+		float sum = 0.0;
+		for (int i = 1; i < 5; i++)
+			sum += fabsf(perlin(point.x*i, point.y*i, point.z*i))/i;
+		float value = sinf(point.x + sum)/2 + 0.5;
+		return Colour(value*colour.r, value*colour.g, value*colour.b);
+	};
+};
+
+class Material
+{
+public:
+	float ambient, diffuse, specular, shininess; // Phong constants
+	float reflection; // how much reflectife is the surface
+	float refraction; // refraction index
+	float transmitivity;
+	Texture texture;
+
+	Material(const Colour &acolour) {
+		texture.colour = acolour;
+		ambient = 0.1;
+		diffuse = 0.5;
+		specular = 1.0;
+		shininess = 20.0;
+		reflection = 0.5;
+	}
+};
+
+class Shape
+{
+public:
+	Material *material;
+	Shape() {};
+	virtual ~Shape() {};
+
+	// first intersection point
+	virtual bool intersect(const Ray &ray, float &dist) = 0;
+
+	// all intersections (only for CSG)
+	virtual bool intersect_all(const Ray &ray, float dist, vector<float> &allts) = 0;
+
+	// normal at point P
+	virtual Vector3 normal(Vector3 &P) = 0;
+};
+
+class Sphere: public Shape
+{
+	float sqr_radius;
+	float inv_radius;
+public:
+	Vector3 center;
+	float radius;
+
+	Sphere(const Vector3 &acenter, const float aradius, Material *amaterial):
+		sqr_radius(aradius*aradius), inv_radius(1.0f/aradius),
+		center(acenter), radius(aradius) { material = amaterial; }
+	bool intersect(const Ray &ray, float &dist);
+	bool intersect_all(const Ray &ray, float dist, vector<float> &allts);
+	Vector3 normal(Vector3 &P) { return (P - center) * inv_radius; };
+};
+
+class Plane: public Shape
+{
+public:
+	Vector3 N;
+	float d;
+
+	Plane(const Vector3 &normal, const float ad, Material *amaterial):
+		N(normal), d(ad) { material = amaterial; };
+	Plane(const Vector3 &normal, const Vector3 &point):
+		N(normal), d(0) { /*TODO*/};
+	bool intersect(const Ray &ray, float &dist);
+	bool intersect_all(const Ray &ray, float dist, vector<float> &allts) {return false;};
+	Vector3 normal(Vector3 &) { return N; };
+};
+
+class Triangle: public Shape
+{
+	int k; // dominant axis
+	float nu, nv, nd;
+	float bnu, bnv;
+	float cnu, cnv;
+public:
+	Vector3 A, B, C, N;
+
+	Triangle(const Vector3 &aA, const Vector3 &aB, const Vector3 &aC, Material *amaterial);
+	bool intersect(const Ray &ray, float &dist);
+	bool intersect_all(const Ray &ray, float dist, vector<float> &allts) {return false;};
+	Vector3 normal(Vector3 &) { return N; };
+};
+
+#endif