From 76c92327f976037f11521bbfcdaa88a214193877 Mon Sep 17 00:00:00 2001
From: devZoGok <nenkokeko@yandex.com>
Date: Fri, 25 Mar 2022 20:10:38 +0200
Subject: [PATCH] ray sample

---
 raySample.cpp | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 raySample.cpp

diff --git a/raySample.cpp b/raySample.cpp
new file mode 100644
index 0000000..f0a46fc
--- /dev/null
+++ b/raySample.cpp
@@ -0,0 +1,81 @@
+#include "root.h"
+#include "model.h"
+#include "material.h"
+#include "assetManager.h"
+#include "lineRenderer.h"
+#include "ray.h"
+
+using namespace std;
+using namespace vb01;
+
+int main(){
+		const string PATH = "../", TEX_PATH = PATH + "samples/textures/", MODEL_PATH = PATH + "samples/models/";
+
+		const int numTextures = 6;
+		string skyboxTextures[numTextures] = {
+			TEX_PATH + "top.jpg",
+			TEX_PATH + "bottom.jpg",
+			TEX_PATH + "left.jpg",
+			TEX_PATH + "right.jpg",
+			TEX_PATH + "front.jpg",
+			TEX_PATH + "back.jpg"
+		};
+
+		for(int i = 0; i < numTextures; i++)
+			AssetManager::getSingleton()->load(skyboxTextures[i]);
+		
+		/*
+		 * Gets Root object to start the sample, 
+		 * also passes the base path for asset retrieval. 
+		*/
+		Root *root = Root::getSingleton();
+		root->start(800, 600, PATH, "Ray sample");
+		root->createSkybox(skyboxTextures);
+		
+		Camera *cam = root->getCamera();
+		cam->setPosition(Vector3(1, 1, 1) * 10);
+		cam->lookAt(Vector3(-1, -1, -1).norm(), Vector3(-1, 1, -1).norm());
+		
+		Node *rootNode = root->getRootNode();
+
+		string modelPath = MODEL_PATH + "sphere.xml";
+		AssetManager::getSingleton()->load(modelPath);
+		Model *sphModel = new Model(modelPath);
+		Material *mat = new Material(PATH + "texture");
+		mat->addBoolUniform("lightingEnabled", false);
+		mat->addBoolUniform("texturingEnabled", false);
+		mat->addVec4Uniform("diffuseColor", Vector4::VEC_L);
+		sphModel->setMaterial(mat);
+		rootNode->attachChild(sphModel);
+		sphModel->setPosition(Vector3(-4, 0, 0));
+
+		LineRenderer *lineRenderer = LineRenderer::getSingleton();
+		float endYPos = -4;
+		Vector3 rayStart = Vector3(4, 0, 0);
+		lineRenderer->addLine(rayStart, Vector3(-4, endYPos, 0), Vector3::VEC_IJK);
+		float shiftSpeed = -.1;
+
+		while(true){
+				if(endYPos < -4)
+						shiftSpeed = .1;
+				else if(endYPos > 4)
+						shiftSpeed = -.1;
+
+				endYPos += shiftSpeed;
+				Vector3 rayEnd = Vector3(-4, endYPos, 0);
+				lineRenderer->changeLineField(0, rayEnd, LineRenderer::END);
+
+				vector<Ray::CollisionResult> results;
+				Ray::retrieveCollisions(rayStart, rayEnd - rayStart, sphModel, results);
+				Ray::sortResults(results);
+
+				mat->setVec4Uniform("diffuseColor", Vector4::VEC_L);
+
+				if(!results.empty())
+					mat->setVec4Uniform("diffuseColor", Vector4(1, 0, 0, 1));
+
+				root->update();
+		}
+
+		return 0;
+}