zoom offset

[fishladder.git] / fishladder.c

diff --git a/fishladder.c b/fishladder.c
index d663fd75927207502217807753fbe318c022601d..bb3c98a4157fcc02dedcb6e15c6c2c57de943e8c 100644 (file)
--- a/fishladder.c
+++ b/fishladder.c
@@ -61,7 +61,8 @@ enum e_world_button
        k_world_button_none = -1,
        k_world_button_sim = 0,
        k_world_button_pause = 1,
-       k_world_button_speedy = 2
+       k_world_button_speedy = 2,
+       k_world_button_settings = 3
 };
 
 #define FLAG_CANAL             0x1
@@ -194,9 +195,7 @@ world_static =
                { .mode = k_world_button_mode_toggle },
                { .mode = k_world_button_mode_toggle },
                { .mode = k_world_button_mode_toggle },
-               {
-                       // TODO: Settings button and menu
-               }
+               { .mode = k_world_button_mode_toggle }
        }
 };
 
@@ -1462,7 +1461,7 @@ static int cell_interactive( v2i co )
        return 1;
 }
 
-void vg_update(void)
+static void vg_update(void)
 {
        // Camera
        // ========================================================================================================
@@ -1473,17 +1472,29 @@ void vg_update(void)
        
        static float size_current = 2.0f;
        static v3f origin_current = { 0.0f, 0.0f, 0.0f };
+       static v2f drag_offset = { 0.0f, 0.0f };
+       static v2f view_point = { 0.0f, 0.0f };
+       v2f result_view;
+       static float view_zoom_extra = 0.0f;
+
+       size = ( r2 < r1? (float)(world.w+5) * 0.5f: ((float)(world.h+5) * 0.5f) / r1 ) + 0.5f;
        
-       size = ( r2 < r1? (float)(world.w+5) * 0.5f: ((float)(world.h+5) * 0.5f) / r1 ) + 0.5f; 
-       
-       v3f origin;
+       v2f origin;
+       v2f vt_target;
+
        origin[0] = floorf( -0.5f * ((float)world.w-4.5f) );
        origin[1] = floorf( -0.5f * world.h );
-       origin[2] = 0.0f;
        
+       // Create and clamp result view
+       v2_add( view_point, drag_offset, result_view );
+       result_view[0] = vg_clampf( result_view[0], -view_zoom_extra, view_zoom_extra );
+       result_view[1] = vg_clampf( result_view[1], -view_zoom_extra*r1, view_zoom_extra*r1 );
+       
+       v2_add( origin, result_view, vt_target );
+
        // Lerp towards target
-       size_current = vg_lerpf( size_current, size, vg_time_delta * 6.0f );
-       v2_lerp( origin_current, origin, vg_time_delta * 6.0f, origin_current ); 
+       size_current = vg_lerpf( size_current, size - view_zoom_extra, vg_time_delta * 6.0f );
+       v2_lerp( origin_current, vt_target, vg_time_delta * 6.0f, origin_current ); 
        
        m3x3_projection( m_projection, -size_current, size_current, -size_current*r1, size_current*r1 );
        m3x3_identity( m_view );
@@ -1498,6 +1509,82 @@ void vg_update(void)
        world.tile_x = floorf( world.tile_pos[0] );
        world.tile_y = floorf( world.tile_pos[1] );
 
+       // Camera dragging
+       static v2f drag_origin; // x/y pixel
+
+       if( vg_get_button_down( "tertiary" ) )
+               v2_copy( vg_mouse, drag_origin );
+       else if( vg_get_button( "tertiary" ) )
+       {
+               // get offset
+               v2_sub( vg_mouse, drag_origin, drag_offset );
+               v2_div( drag_offset, (v2f){ vg_window_x, vg_window_y }, drag_offset );
+               v2_mul( drag_offset, (v2f){ size_current*2.0f, -size_current*r1*2.0f }, drag_offset );
+       }
+       else
+       {
+               v2_copy( result_view, view_point );
+               v2_copy( (v2f){0.0f,0.0f}, drag_offset );
+       }
+
+       // calculate relative position of mouse in view_point space
+       
+       { // Debug
+               v2f lwr; v2f upr;
+               v2f lwr1; v2f upr1;
+               v2f p0; v2f p1;
+               v2f vo;
+               v2f mouse_viewspace;
+
+               float rsize = size-view_zoom_extra;
+
+               v2_sub( (v2f){ -size + 0.1f, -size*r1 + 0.1f }, origin, lwr );
+               v2_sub( (v2f){  size - 0.1f,  size*r1 - 0.1f }, origin, upr );
+
+               v2_sub( (v2f){ -rsize, -rsize*r1 }, vt_target, lwr1 );
+               v2_sub( (v2f){  rsize,  rsize*r1 }, vt_target, upr1 );
+
+               vg_line_box( lwr, upr, 0xffffff00 );
+               vg_line_box( lwr1, upr1, 0xff00ff00 );
+
+               // Calculate vector towards mouse from vt_target
+               v2f mouse_delta;
+               v2_muls( vt_target, -1.0f, vo );
+
+               v2_sub( vt_target, vg_mouse_ws, mouse_delta );
+
+               vg_line( vo, vg_mouse_ws, 0xffffffff );
+
+               // Mouse Locally
+               v2_div( vg_mouse, (v2f){ vg_window_x, vg_window_y }, mouse_viewspace );
+               mouse_viewspace[0] = mouse_viewspace[0]*rsize*2.0f;
+               mouse_viewspace[1] = (1.0f-mouse_viewspace[1])*rsize*2.0f*r1;
+
+               v2_add( lwr1, mouse_viewspace, mouse_viewspace );
+
+               vg_line( mouse_viewspace, (v2f){0.0f, 0.0f}, 0xff0000ff );
+       //}
+
+               // Zoom
+               view_zoom_extra = vg_clampf( view_zoom_extra + vg_mouse_wheel[1], 0.0f, size - 4.0f );
+       
+               // Zoom offset adjust
+               rsize = size-view_zoom_extra;
+               v2_sub( (v2f){ -rsize, -rsize*r1 }, vt_target, lwr1 );
+               v2_sub( (v2f){  rsize,  rsize*r1 }, vt_target, upr1 );
+               
+               v2f mouse_viewspace_new;
+               v2_div( vg_mouse, (v2f){ vg_window_x, vg_window_y }, mouse_viewspace_new );
+               mouse_viewspace_new[0] = mouse_viewspace_new[0]*rsize*2.0f;
+               mouse_viewspace_new[1] = (1.0f-mouse_viewspace_new[1])*rsize*2.0f*r1;
+
+               v2_add( lwr1, mouse_viewspace_new, mouse_viewspace_new );
+
+               v2f zoom_offset;
+               v2_sub( mouse_viewspace, mouse_viewspace_new, zoom_offset );
+               v2_muladds( view_point, zoom_offset, -1.0f, view_point );
+       }
+
        // Tilemap
        // ========================================================================================================
        if( !is_simulation_running() && !gui_want_mouse() )
@@ -2710,6 +2797,11 @@ void vg_render(void)
                }
        }
 
+       if( world_button_exec( &world_static.buttons[k_world_button_settings], (v2f){ 1.0f, 2.0f }, btn_orange, &stat ))
+       {
+               
+       }
+
        level_selection_buttons();
        
        if( vg_get_button_up( "primary" ) )