Fix an issue with groups, and add Chapter 14 example!

README.md

@@ -55,3 +55,6 @@ From Chapter 13 - Cylinders:
 ![Chapter 13 rendering test](output/ch13_test.png)
 Bonus:
 ![Chapter 13 cone test](output/ch13_cone.png)
+
+From Chapter 14 - Groups & Bounding boxes
+![Chapter 14 rendering test](output/ch14_test.png)

source/include/group.h

@@ -37,10 +37,10 @@ public:
     Shape *operator[](const int p) { return this->objectList[p]; }
 
     Intersect intersect(Ray r);
-
     BoundingBox getBounds();
 
     void updateBoundingBox();
+    void updateTransform();
 
     Group();
 };

source/include/shape.h

@@ -61,7 +61,8 @@ public:
     virtual BoundingBox getBounds();
     virtual bool haveFiniteBounds() { return true; };
 
-    void updateTransform();
+    virtual void updateTransform();
+
     Tuple worldToObject(Tuple point) { return this->inverseTransform * point; };
     Tuple objectToWorld(Tuple point) { return this->transformMatrix * point; };
     Tuple normalToWorld(Tuple normalVector);

source/shapes/group.cpp

@@ -137,3 +137,31 @@ void Group::updateBoundingBox()
         }
     }
 }
+
+void Group::updateTransform()
+{
+    int i;
+
+    Shape::updateTransform();
+    if (this->objectCount > 0)
+    {
+        for (i = 0 ; i < this->objectCount ; i++)
+        {
+            this->objectList[i]->updateTransform();
+        }
+    }
+
+    /* We are force to do them all the time */
+    if (this->unboxableObjectCount > 0)
+    {
+        for(i = 0; i < this->unboxableObjectCount; i++)
+        {
+            this->unboxableObjectList[i]->updateTransform();
+        }
+    }
+
+    /* Once the full stack being notified of the changes, let's update the
+     * bounding box
+     */
+    this->updateBoundingBox();
+}

tests/CMakeLists.txt

@@ -85,6 +85,11 @@ target_include_directories(ch13_cone PUBLIC ../source/include)
 target_sources(ch13_cone PRIVATE ch13_cone.cpp)
 target_link_libraries(ch13_cone rayonnement)
 
+add_executable(ch14_test)
+target_include_directories(ch14_test PUBLIC ../source/include)
+target_sources(ch14_test PRIVATE ch14_test.cpp)
+target_link_libraries(ch14_test rayonnement)
+
 add_test(NAME Chapter05_Test COMMAND $<TARGET_FILE:ch5_test>)
 add_test(NAME Chapter06_Test COMMAND $<TARGET_FILE:ch6_test>)
 add_test(NAME Chapter07_Test COMMAND $<TARGET_FILE:ch7_test>)
@@ -96,6 +101,7 @@ add_test(NAME Chapter11_Test COMMAND $<TARGET_FILE:ch11_test>)
 add_test(NAME Chapter12_Test COMMAND $<TARGET_FILE:ch12_test>)
 add_test(NAME Chapter13_Test COMMAND $<TARGET_FILE:ch13_test>)
 add_test(NAME Chapter13_ConeBonus COMMAND $<TARGET_FILE:ch13_cone>)
+add_test(NAME Chapter14_Test COMMAND $<TARGET_FILE:ch14_test>)
 add_test(NAME Test_Rendering COMMAND $<TARGET_FILE:test_render>)
 add_test(NAME Hw3Render COMMAND $<TARGET_FILE:hw3render> ${CMAKE_CURRENT_SOURCE_DIR}/test.hw3scene)
 add_test(NAME Hw3RenderAllCmds COMMAND $<TARGET_FILE:hw3render> ${CMAKE_CURRENT_SOURCE_DIR}/test_keys.hw3scene)

tests/ch14_test.cpp

@@ -0,0 +1,203 @@
+/*
+ *  DoRayMe - a quick and dirty Raytracer
+ *  Render test for reflection in chapter 13.
+ *
+ *  Created by Manoël Trapier
+ *  Copyright (c) 2020 986-Studio.
+ *
+ */
+#include <world.h>
+#include <light.h>
+#include <sphere.h>
+#include <plane.h>
+#include <cube.h>
+#include <cylinder.h>
+#include <material.h>
+#include <colour.h>
+#include <canvas.h>
+#include <camera.h>
+#include <group.h>
+#include <cone.h>
+
+#include <pattern.h>
+#include <strippattern.h>
+#include <gradientpattern.h>
+#include <checkerspattern.h>
+#include <ringpattern.h>
+
+#include <transformation.h>
+
+Shape *leg()
+{
+    Group *ret = new Group();
+    Sphere *s = new Sphere();
+    s->setTransform(translation(0, 0, -1) * scaling(0.25, 0.25, 0.25));
+    ret->addObject(s);
+    Cylinder *cyl = new Cylinder();
+    cyl->minCap = 0;
+    cyl->maxCap = 1;
+    cyl->isClosed = false;
+    cyl->setTransform(translation(0, 0, -1) * rotationY(-0.5236) * rotationZ(-1.5708) * scaling(0.25, 1, 0.25));
+
+    ret->addObject(cyl);
+
+    return ret;
+}
+
+Shape *cap()
+{
+    Group *ret = new Group();
+
+    Cone *c = new Cone();
+    c->minCap = -1;
+    c->maxCap = 0;
+    c->isClosed = false;
+    c->setTransform(rotationX(-0.7854) * scaling(0.24606, 1.37002, 0.24606));
+    ret->addObject(c);
+
+    c = new Cone();
+    c->minCap = -1;
+    c->maxCap = 0;
+    c->isClosed = false;
+    c->setTransform(rotationY(1.0472) * rotationX(-0.7854) * scaling(0.24606, 1.37002, 0.24606));
+    ret->addObject(c);
+
+    c = new Cone();
+    c->minCap = -1;
+    c->maxCap = 0;
+    c->isClosed = false;
+    c->setTransform(rotationY(2.0944) * rotationX(-0.7854) * scaling(0.24606, 1.37002, 0.24606));
+    ret->addObject(c);
+
+    c = new Cone();
+    c->minCap = -1;
+    c->maxCap = 0;
+    c->isClosed = false;
+    c->setTransform(rotationY(3.1416) * rotationX(-0.7854) * scaling(0.24606, 1.37002, 0.24606));
+    ret->addObject(c);
+
+    c = new Cone();
+    c->minCap = -1;
+    c->maxCap = 0;
+    c->isClosed = false;
+    c->setTransform(rotationY(4.1888) * rotationX(-0.7854) * scaling(0.24606, 1.37002, 0.24606));
+    ret->addObject(c);
+
+    c = new Cone();
+    c->minCap = -1;
+    c->maxCap = 0;
+    c->isClosed = false;
+    c->setTransform(rotationY(5.236) * rotationX(-0.7854) * scaling(0.24606, 1.37002, 0.24606));
+    ret->addObject(c);
+
+    return ret;
+}
+
+Shape *wacky()
+{
+    Group *ret = new Group();
+
+    Shape *s;
+
+    s = leg();
+    ret->addObject(s);
+
+    s = leg();
+    s->setTransform(rotationY(1.0472));
+    ret->addObject(s);
+
+    s = leg();
+    s->setTransform(rotationY(2.0944));
+    ret->addObject(s);
+
+    s = leg();
+    s->setTransform(rotationY(3.1416));
+    ret->addObject(s);
+
+    s = leg();
+    s->setTransform(rotationY(4.1888));
+    ret->addObject(s);
+
+    s = leg();
+    s->setTransform(rotationY(5.236));
+    ret->addObject(s);
+
+    s = cap();
+    s->setTransform(translation(0, 1, 0));
+    ret->addObject(s);
+
+    s = cap();
+    s->setTransform(rotationX(3.1416) * translation(0, 1, 0));
+    ret->addObject(s);
+    
+    return ret;
+}
+int main()
+{
+    World w = World();
+
+    /* Add lights */
+    Light light1 = Light(POINT_LIGHT, Point(10000, 10000, -10000), Colour(0.25, 0.25, 0.25));
+    w.addLight(&light1);
+    Light light2 = Light(POINT_LIGHT, Point(-10000, 10000, -10000), Colour(0.25, 0.25, 0.25));
+    w.addLight(&light2);
+    Light light3 = Light(POINT_LIGHT, Point(10000, -10000, -10000), Colour(0.25, 0.25, 0.25));
+    w.addLight(&light3);
+    Light light4 = Light(POINT_LIGHT, Point(-10000, -10000, -10000), Colour(0.25, 0.25, 0.25));
+    w.addLight(&light4);
+
+    /* ----------------------------- */
+
+    /* White background */
+    Plane p = Plane();
+    p.setTransform(translation(0, 0, 100) *  rotationX(1.5708));
+    p.material.colour = Colour(1, 1, 1);
+    p.material.ambient = 1;
+    p.material.diffuse = 0;
+    p.material.specular = 0;
+    w.addObject(&p);
+    
+    Shape *wa;
+    
+    wa = wacky();
+    wa->setTransform(translation(-2.8, 0, 0) * rotationX(0.4363) * rotationY(0.1745));
+    wa->material.colour = Colour(0.9, 0.2, 0.4);
+    wa->material.ambient = 0.2;
+    wa->material.diffuse = 0.8;
+    wa->material.specular = 0.7;
+    wa->material.shininess = 20;
+    w.addObject(wa);
+
+    wa = wacky();
+    wa->setTransform(rotationY(0.1745));
+    wa->material.colour = Colour(0.2, 0.9, 0.6);
+    wa->material.ambient = 0.2;
+    wa->material.diffuse = 0.8;
+    wa->material.specular = 0.7;
+    wa->material.shininess = 20;
+    w.addObject(wa);
+
+    wa = wacky();
+    wa->setTransform(translation(2.8, 0, 0) * rotationX(-0.4363) * rotationY(-0.1745));
+    wa->material.colour = Colour(0.2, 0.3, 1.0);
+    wa->material.ambient = 0.2;
+    wa->material.diffuse = 0.8;
+    wa->material.specular = 0.7;
+    wa->material.shininess = 20;
+    w.addObject(wa);
+
+    /* ----------------------------- */
+
+    /* Set the camera */
+    Camera camera = Camera(1000, 334, 0.9);
+    camera.setTransform(viewTransform(Point(0, 0, -9),
+                                      Point(0, 0, 0),
+                                      Vector(0, 1, 0)));
+
+    /* Now render it */
+    Canvas image = camera.render(w, 5);
+
+    image.SaveAsPNG("ch14_test.png");
+
+    return 0;
+}