Fixing width/height calculation so that each of the 4 viewports has a equal share of the viewer

Ryan Gordon · Ryan Gordon · commit 72c991e621c4 · 2015-11-29T12:51:50.000-08:00
diff --git a/examples/viewer.cpp b/examples/viewer.cpp
@@ -3,8 +3,8 @@
 
 
 Viewer::Viewer() : shader_folder("src/shader/"), 
-                   win_width(1280), 
-                   win_height(800)
+                   win_width(600),
+                   win_height(400)
 {
     // init glfw - if already initialized nothing happens
     int init = glfwInit();
@@ -35,7 +35,7 @@ void Viewer::initialize()
 #endif
     //glfwWindowHint(GLFW_VISIBLE, debug ? GL_TRUE : GL_FALSE);
 
-    window = glfwCreateWindow(win_width, win_height, "Viewer (press ESC to exit)", 0, NULL);
+    window = glfwCreateWindow(win_width*2, win_height*2, "Viewer (press ESC to exit)", 0, NULL);
     if (window == NULL)
     {
         std::cerr << "Failed to create opengl window." << std::endl;
@@ -122,7 +122,8 @@ void Viewer::winsize_callbackstatic(GLFWwindow* window, int w, int h)
 
 void Viewer::winsize_callback(GLFWwindow* window, int w, int h)
 {
-    win_width = w; win_height = h;
+    win_width = w/2;
+    win_height = h/2;
 }
 
 void Viewer::key_callbackstatic(GLFWwindow* window, int key, int scancode, int action, int mods)

Original file line number	Diff line number	Diff line change
`@@ -3,8 +3,8 @@`
`3`	`3`
`4`	`4`
`5`	`5`	`Viewer::Viewer() : shader_folder("src/shader/"),`
`6`		`- win_width(1280),`
`7`		`- win_height(800)`
	`6`	`+ win_width(600),`
	`7`	`+ win_height(400)`
`8`	`8`	`{`
`9`	`9`	`// init glfw - if already initialized nothing happens`
`10`	`10`	`int init = glfwInit();`
`@@ -35,7 +35,7 @@ void Viewer::initialize()`
`35`	`35`	`#endif`
`36`	`36`	`//glfwWindowHint(GLFW_VISIBLE, debug ? GL_TRUE : GL_FALSE);`
`37`	`37`
`38`		`- window = glfwCreateWindow(win_width, win_height, "Viewer (press ESC to exit)", 0, NULL);`
	`38`	`+ window = glfwCreateWindow(win_width2, win_height2, "Viewer (press ESC to exit)", 0, NULL);`
`39`	`39`	`if (window == NULL)`
`40`	`40`	`{`
`41`	`41`	`std::cerr << "Failed to create opengl window." << std::endl;`
`@@ -122,7 +122,8 @@ void Viewer::winsize_callbackstatic(GLFWwindow* window, int w, int h)`
`122`	`122`
`123`	`123`	`void Viewer::winsize_callback(GLFWwindow* window, int w, int h)`
`124`	`124`	`{`
`125`		`- win_width = w; win_height = h;`
	`125`	`+ win_width = w/2;`
	`126`	`+ win_height = h/2;`
`126`	`127`	`}`
`127`	`128`
`128`	`129`	`void Viewer::key_callbackstatic(GLFWwindow* window, int key, int scancode, int action, int mods)`