From 6dce8d1945731314ee4def31431cc99a6d620192 Mon Sep 17 00:00:00 2001
From: Jonas Gunz <himself@jonasgunz.de>
Date: Sun, 10 Feb 2019 01:57:40 +0100
Subject: cObjectHandler: Implemented Camera movement

cObjectHandler can now move the origin of the camera around the screen
---
 cObjectHandler.cpp | 35 ++++++++++++++++++++++++++++++++---
 cObjectHandler.h   |  6 ++++++
 test.cpp           | 38 ++++++++++++++++++++++++++++++++++----
 3 files changed, 72 insertions(+), 7 deletions(-)

diff --git a/cObjectHandler.cpp b/cObjectHandler.cpp
index dba0b77..8a62a52 100644
--- a/cObjectHandler.cpp
+++ b/cObjectHandler.cpp
@@ -3,6 +3,9 @@
 cObjectHandler::cObjectHandler(cRender *_render)
 {
 	render = _render;
+
+	cameraPosition = {0,0};
+
 	iActiveObject = 0;
 
 	objects.push_back(NULL); //Create first Object as Catcher for Events
@@ -56,7 +59,11 @@ int cObjectHandler::write()
 	for (unsigned long int i = 0; i < meshes.size(); i++)
 	{
 		if(meshes[i])
+		{
+			moveWiremesh(i,{-cameraPosition.x, -cameraPosition.y, 0} ,_MOVE_RELATIVE);
 			meshes[i]->write(render);
+			moveWiremesh(i,{cameraPosition.x, cameraPosition.y, 0},_MOVE_RELATIVE);
+		}
 	}
 
 	for (unsigned long int i = 0; i < objects.size(); i++)
@@ -69,7 +76,8 @@ int cObjectHandler::write()
 			for (int o = 0; o < obj.sizeY; o++) { //y axis
 				for (int p = 0; p < obj.sizeX; p++) { //x axis
 					if (obj.cScreen[p][o]) { //Dont overwrite empty pixels
-						sPos pos{ obj.pos.x + p, obj.pos.y + o };
+						sPos pos{ obj.pos.x + p - cameraPosition.x,
+							 				obj.pos.y + o - cameraPosition.y };
 						render->drawPoint(obj.cScreen[p][o], pos, true, obj.wColor[p][o]);
 					}
 				}
@@ -92,8 +100,8 @@ int cObjectHandler::clickEvent(sPos _pos, unsigned int _button)
 	{
 		sPos rel_pos;
 		sPos obj_pos = objects[ iHitMap[_pos.x][_pos.y] ]->getPosition();
-		rel_pos.x = _pos.x - obj_pos.x;
-		rel_pos.y = _pos.y - obj_pos.y;
+		rel_pos.x = _pos.x - obj_pos.x + cameraPosition.x;
+		rel_pos.y = _pos.y - obj_pos.y + cameraPosition.y;
 
 		iActiveObject = iHitMap[_pos.x][_pos.y]; //Set active object
 		objects[ iHitMap[_pos.x][_pos.y] ]->onClick(rel_pos, _button);
@@ -155,6 +163,9 @@ void cObjectHandler::buildHitmap()
 			sPos oPos = objects[i]->getPosition();
 			sPos oSize = objects[i]->getSize();
 
+			oPos.x -= cameraPosition.x;
+			oPos.y -= cameraPosition.y;
+
 			for(int x = oPos.x; x < oPos.x + oSize.x; x++)
 			{
 				for(int y = oPos.y; y < oPos.y + oSize.y; y++)
@@ -231,3 +242,21 @@ int cObjectHandler::rotateWiremesh(int _mesh, sCoord3d _angle)
 
 	return 0;
 }
+
+void cObjectHandler::setCameraPosition(sPos _pos, int _mode)
+{
+	if(_mode == _MOVE_ABSOLUTE)
+		cameraPosition = _pos;
+	else if(_mode == _MOVE_RELATIVE)
+	{
+		cameraPosition.x += _pos.x;
+		cameraPosition.y += _pos.y;
+	}
+
+	buildHitmap();
+}
+
+sPos cObjectHandler::getCameraPosition()
+{
+	return cameraPosition;
+}
diff --git a/cObjectHandler.h b/cObjectHandler.h
index bc6a48d..0e7750c 100644
--- a/cObjectHandler.h
+++ b/cObjectHandler.h
@@ -53,6 +53,11 @@ public:
 	int destroyWiremesh(int _mesh);
 
 
+	void setCameraPosition(sPos _pos, int _mode);
+
+	sPos getCameraPosition();
+
+
 	/**
 	* writes all objects in objects[] to render buffer
 	*/
@@ -91,4 +96,5 @@ private:
 	vector< vector<unsigned int> > iHitMap;
 	cRender *render;
 	unsigned long int iActiveObject;
+	sPos cameraPosition;
 };
diff --git a/test.cpp b/test.cpp
index d9970b4..4278f2a 100644
--- a/test.cpp
+++ b/test.cpp
@@ -11,12 +11,39 @@
 
 //#include "testobject.h"
 
+class testobject : cObject
+{
+public:
+  testobject()
+  {
+    setSize(10,5);
+    cc = 0;
+
+    drawRectangle('#', NULL, {0,0}, {9,4}, _COL_GREEN, _COL_DEFAULT);
+  }
+
+  ~testobject() { destruct(); }
+
+  virtual void onClick(sPos _pos, unsigned int _button)
+  {
+    cc++;
+    drawText(std::to_string(cc), {2,2}, _COL_RED);
+
+    drawPoint('Q', _pos, true, _COL_YELLOW);
+  }
+
+	virtual void onChar(unsigned char _c) { drawPoint(_c, {1,1},true, _COL_BLUE); }
+private:
+  int cc;
+};
+
 int main(int argc, char* argv[])
 {
 	cRender render(' ', _COL_DEFAULT, 30,30);
 	cObjectHandler handler(&render);
 	cObject ver(45,1);
 	cWiremesh obj;
+	testobject obj2;
 
 	cInput input;
 
@@ -59,6 +86,9 @@ int main(int argc, char* argv[])
 	obj.addVector({x,-x,0}, {0,2*y,0}, ',', _COL_RED);
 	int imesh = handler.createWiremesh(&obj);
 
+	int iobj2 = handler.createObject((cObject*)&obj2);
+	handler.moveObject(iobj2, {3,3}, _MOVE_ABSOLUTE);
+
 	sPos middle = render.getSize();
 	middle.x /= 2;
 	middle.y /= 2;
@@ -76,16 +106,16 @@ int main(int argc, char* argv[])
 				switch (ie.c)
 				{
 					case 'A'://up
-						handler.moveWiremesh(imesh,{0,-1,0}, _MOVE_RELATIVE);
+						handler.setCameraPosition({0,-1}, _MOVE_RELATIVE);
 						break;
 					case 'B'://down
-						handler.moveWiremesh(imesh,{0,1,0}, _MOVE_RELATIVE);
+						handler.setCameraPosition({0,1}, _MOVE_RELATIVE);
 						break;
 					case 'C'://right
-						handler.moveWiremesh(imesh,{1,0,0}, _MOVE_RELATIVE);
+						handler.setCameraPosition({1,0}, _MOVE_RELATIVE);
 						break;
 					case 'D'://left
-						handler.moveWiremesh(imesh,{-1,0,0}, _MOVE_RELATIVE);
+						handler.setCameraPosition({-1,0}, _MOVE_RELATIVE);
 						break;
 				};
 			}
-- 
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