3d rays

demo/demo.cpp

@@ -11,7 +11,31 @@ void game::run(SDL_Renderer* renderer)
 		SDL_RenderDrawLine(renderer, ray2.start.x, ray2.start.y, ray2.end.x, ray2.end.y);
 	}
 	global::entList.at(0)->x = global::mousePos.x;
-	global::entList.at(0)->y = global::mousePos.y;*/
+	global::entList.at(0)->y = global::mousePos.y;
-	//global::entList.run(renderer);
+	global::entList.run(renderer);*/
+	//global::cam.run(renderer);
+	static float pitch, yaw;
+	for (int y = 1; y < 250; y += 1)
+	{
+		for (int x = 1; x < 250; x += 1)
+		{
+			ray3D ray1 = ray3D::trace(vector3(x, y, 0), vector3(yaw, pitch, 1));
+			if (ray1.dist < 500)
+			{
+				SDL_SetRenderDrawColor(renderer, 255 - ray1.dist, 255 - ray1.dist, 255 - ray1.dist, 255);
+				SDL_RenderDrawPoint(renderer, x * 2, y * 2);
+				SETRENDER_WHITE;
+			}
+		}
+	}
+	if (GetAsyncKeyState(VK_DOWN))
+		pitch += 1;
+	if (GetAsyncKeyState(VK_UP))
+		pitch -= 1;
+	if (GetAsyncKeyState(VK_LEFT))
+		yaw -= 1;
+	if (GetAsyncKeyState(VK_RIGHT))
+		yaw += 1;
+	std::cout << global::entList3D.at(0)->x << global::entList3D.at(0)->y << std::endl;
 	global::entList3D.run(renderer);
 }

demo/demo.h

@@ -7,6 +7,8 @@
 #include "../stuff/objects/vector2.h"
 #include "../stuff/objects/vector3.h"
 #include "../stuff/objects/ray2D.h"
+#include "../stuff/objects/ray3D.h"
+#include "../stuff/objects/camera.h"
 
 #include "../stuff/globals/globals.h"
 #include "../stuff/callbacks/callbacks.h"

main.cpp

@@ -12,14 +12,14 @@ int main(int argc, char** argv)
 	SDL_Renderer* renderer = nullptr;
 
 	SDL_Init(SDL_INIT_VIDEO);
-	window = SDL_CreateWindow("threedee", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 1280, 720, SDL_WINDOW_SHOWN);
+	window = SDL_CreateWindow("threedee", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 500, 500, SDL_WINDOW_SHOWN);
 	surface = SDL_GetWindowSurface(window);
 	renderer = SDL_CreateRenderer(window, -1, NULL);
 	SETRENDER_WHITE;
 	SDL_Event eventHandler;
 
 	//global::entList.push_back(&square(200, 200, 50));
-	global::entList3D.push_back(&cube(200, 200, 200, 50));
+	global::entList3D.push_back(&cube(1, 1, 50, 50));
 
 	while (global::running)
 	{

stuff/globals/globals.cpp

@@ -3,4 +3,5 @@
 bool global::running = true;
 vector2 global::mousePos;
 entityList2D global::entList;
-entityList3D global::entList3D;
+entityList3D global::entList3D;
+camera global::cam(vector3(0, 0, 0), vector3(0, 0, 0));

stuff/globals/globals.h

@@ -1,5 +1,6 @@
 #pragma once
 #include "../objects/vector3.h"
+#include "../objects/camera.h"
 #include "../objects/entityList2D.h"
 #include "../objects/entityList3D.h"
 namespace global
@@ -8,4 +9,5 @@ namespace global
 	extern vector2 mousePos;
 	extern entityList2D entList;
 	extern entityList3D entList3D;
+	extern camera cam;
 }

stuff/objects/camera.h

@@ -1,5 +1,19 @@
 #pragma once
+#include "vector3.h"
+#include "SDL.h"
+#include <iostream>
 struct camera
 {
-
+	vector3 position;
+	vector3 rotation;
+	camera(vector3 position_, vector3 rotation_)
+	{
+		this->position = position_;
+		this->rotation = rotation_;
+	}
+	void run(SDL_Renderer* renderer)
+	{
+		//ray3D ray = ray3D::trace(vector3(0, 0, -10), vector3(0, 0, 1));
+		//std::cout << ray.dist << std::endl;
+	}
 };

stuff/objects/cube.h

@@ -16,7 +16,7 @@ struct cube : public square
 	}
 	void run(SDL_Renderer* renderer)
 	{
-		//SDL_Rect rect{ this->x, this->y, this->radius, this->radius };
+		SDL_Rect rect{ this->x, this->y, this->radius, this->radius};
 		//SDL_RenderFillRect(renderer, &rect);
 	}
 };

stuff/objects/ray3D.h

@@ -0,0 +1,46 @@
+#pragma once
+#include <numeric>
+#include "../globals/globals.h"
+
+#include "vector3.h"
+#include "cube.h"
+
+struct ray3D
+{
+	vector3 start;
+	vector3 end;
+	float dist;
+	cube* hitEnt;
+	static ray3D trace(vector3 start, vector3 direction)
+	{
+		ray3D ray{ start, start, -1 };
+		vector3 point = start;
+		bool hit = false;
+		while (!hit)
+		{
+			for (int i = 0; i < global::entList3D.size(); i++)
+			{
+				cube* object = global::entList3D.at(i);
+				if (inCube(point, vector3(object->x, object->y, object->z), vector3(object->x + object->radius, object->y + object->radius, object->z + object->radius)) || ray.dist > 500)
+				{
+					ray.start = start;
+					ray.end = point;
+					ray.dist = start.distance(point);
+					ray.hitEnt = object;
+					hit = true;
+					break;
+				}
+			}
+			ray.dist = start.distance(point);
+			point.x += direction.x;
+			point.y += direction.y;
+			point.z += direction.z;
+		}
+		return ray;
+	}
+	//temp
+	static bool inCube(vector3 point, vector3 a, vector3 b)
+	{
+		return (point.x > a.x && point.y > a.y && point.x < b.x && point.y < b.y && point.z > a.z && point.z < b.z);
+	}
+};

stuff/objects/vector3.h

@@ -18,4 +18,13 @@ struct vector3 : public vector2
 		this->y = y_;
 		this->z = z_;
 	}
+	float length()
+	{
+		return sqrtf((x * x) + (y * y) + (z * z));
+	}
+	float distance(vector3& other)
+	{
+		vector3 dist = vector3(this->x - other.x, this->y - other.y, this->z - other.z);
+		return dist.length();
+	}
 };

threedee.vcxproj

@@ -249,6 +249,7 @@
     <ClInclude Include="stuff\objects\cube.h" />
     <ClInclude Include="stuff\objects\entityList2D.h" />
     <ClInclude Include="stuff\objects\ray2D.h" />
+    <ClInclude Include="stuff\objects\ray3D.h" />
     <ClInclude Include="stuff\objects\square.h" />
     <ClInclude Include="stuff\objects\vector2.h" />
     <ClInclude Include="stuff\objects\vector3.h" />

threedee.vcxproj.filters

@@ -309,6 +309,9 @@
     <ClInclude Include="demo\demo.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="stuff\objects\ray3D.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="main.cpp">