control camera

CMakeLists.txt

@@ -15,10 +15,10 @@ find_package(raylib 3.0 REQUIRED)
 #set(raylib_VERBOSE 1)
 
 add_executable(nw-hello src/main-hello.c)
-target_link_libraries(nw-hello raylib)
+target_link_libraries(nw-hello raylib m)
 
 add_executable(nw-viewer src/main-viewer.c src/networld.c src/controlpanel.c)
-target_link_libraries(nw-viewer raylib)
+target_link_libraries(nw-viewer raylib m)
 
 #without cmake package... 
 #include_directories(${PROJECT_SOURCE_DIR}/raylib/src)

src/controlpanel.c

@@ -4,6 +4,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <math.h>
 
 // Constructor / Destructor
 Panel * Panel_new()
@@ -52,13 +53,15 @@ void Panel_draw(Panel * self)
 
 void Panel_drawBasis(Panel * self)
 {
+    Vector2 screen00= {0.f, 0.f};
+    screen00= Panel_pixelFromPosition(self, &( screen00 ) );
     Vector2 screen10= {1.f, 0.f};
     screen10= Panel_pixelFromPosition(self, &( screen10 ) );
     Vector2 screen01= {0.f, 1.f}; 
     screen01= Panel_pixelFromPosition(self, &( screen01 ) );
-    DrawCircleV( self->screenCenter, 4, BLUE );   
-    DrawLineV( self->screenCenter, screen10, RED );
-    DrawLineV( self->screenCenter, screen01, BLUE );
+    DrawCircleV( screen00, 4, BLUE );   
+    DrawLineV( screen00, screen10, RED );
+    DrawLineV( screen00, screen01, BLUE );
 }
 
 void Panel_drawNode(Panel * self, Node * n)
@@ -82,3 +85,21 @@ Vector2 Panel_positionFromPixel(Panel * self, Vector2 * p)
     Vector2 position= { p->x, p->y };
     return position;
 }
+
+void Panel_control(Panel * self)
+{
+    Panel_controlCamera(self);
+}
+
+void Panel_controlCamera(Panel * self)
+{
+    // KEYBOARD Control:
+    float step= 3.0f / self->scale;
+    if (IsKeyDown(KEY_RIGHT)) self->camera.x += step;
+    if (IsKeyDown(KEY_LEFT)) self->camera.x -= step;
+    if (IsKeyDown(KEY_UP)) self->camera.y += step;
+    if (IsKeyDown(KEY_DOWN)) self->camera.y -= step;
+
+    self->scale += (GetMouseWheelMove()*1.f);
+    self->scale = fmaxf( self->scale, 0.001f );
+}
\ No newline at end of file

src/controlpanel.h

@@ -28,4 +28,8 @@ void Panel_drawNode(Panel * self, Node * n);
 Vector2 Panel_pixelFromPosition(Panel * self, Vector2 * p);
 Vector2 Panel_positionFromPixel(Panel * self, Vector2 * p);
 
+// Control
+void Panel_control(Panel * self);
+void Panel_controlCamera(Panel * self);
+
 #endif //CONTROLPANEL_H
\ No newline at end of file

src/main-viewer.c

@@ -56,6 +56,7 @@ int main(int nbArg, char ** arg)
     // Main game loop
     while (!game_end && !WindowShouldClose())    // Detect window close button or ESC key
     {
+        Panel_control(panel);
         game_update(world);
         Panel_draw(panel);
     }