source/designer/terraintool.cpp

   1 #include <cmath>
   2 #include <msp/gl/meshbuilder.h>
   3 #include <msp/input/keys.h>
   4 #include "designer.h"
   5 #include "terraintool.h"
   6
   7 using namespace std;
   8 using namespace Msp;
   9 using namespace R2C2;
  10
  11 TerrainTool::TerrainTool(Designer &d, Input::Keyboard &k, Input::Mouse &m, Terrain &t):
  12         Tool(d, k, m),
  13         terrain(t),
  14         marker((GL::VERTEX3, GL::COLOR4_UBYTE)),
  15         dragging(false),
  16         drag_start(0)
  17 {
  18         designer.get_layout_3d().get_scene().add(*this);
  19
  20         float ts = terrain.get_type().get_tile_size();
  21         GL::MeshBuilder bld(marker);
  22         bld.begin(GL::TRIANGLE_STRIP);
  23         bld.vertex(-ts/2, 0, -ts/4);
  24         bld.vertex(ts/2, 0, -ts/4);
  25         bld.vertex(-ts/2, 0, ts/4);
  26         bld.vertex(ts/2, 0, ts/4);
  27         bld.end();
  28         bld.begin(GL::TRIANGLE_STRIP);
  29         bld.vertex(0, -ts/2, -ts/4);
  30         bld.vertex(0, ts/2, -ts/4);
  31         bld.vertex(0, -ts/2, ts/4);
  32         bld.vertex(0, ts/2, ts/4);
  33         bld.end();
  34 }
  35
  36 TerrainTool::~TerrainTool()
  37 {
  38         designer.get_layout_3d().get_scene().remove(*this);
  39 }
  40
  41 void TerrainTool::button_press(unsigned btn)
  42 {
  43         if(btn==1)
  44         {
  45                 dragging = true;
  46                 drag_start = pointer.y;
  47         }
  48 }
  49
  50 void TerrainTool::button_release(unsigned btn)
  51 {
  52         if(btn==1)
  53                 dragging = false;
  54 }
  55
  56 void TerrainTool::pointer_motion()
  57 {
  58         if(dragging)
  59         {
  60                 float d = (pointer.y-drag_start)*20;
  61
  62                 if(abs(d)>1)
  63                 {
  64                         float elev = terrain.get_node_elevation(highlight_node);
  65                         float eg = terrain.get_type().get_elevation_granularity();
  66                         elev += eg*d;
  67                         terrain.set_node_elevation(highlight_node, elev, true);
  68                         marker_position = terrain.get_node_position(highlight_node);
  69
  70                         drag_start = pointer.y;
  71                 }
  72         }
  73         else
  74         {
  75                 Ray ray = designer.get_view().create_ray(pointer.x, pointer.y);
  76                 highlight_node = terrain.get_closest_node(ray);
  77                 marker_position = terrain.get_node_position(highlight_node);
  78         }
  79 }
  80
  81 void TerrainTool::render(GL::Renderer &renderer, const GL::Tag &tag) const
  82 {
  83         if(tag.id)
  84                 return;
  85
  86         GL::Renderer::Push push(renderer);
  87
  88         renderer.matrix_stack() *= GL::Matrix::translation(marker_position);
  89         marker.draw(renderer);
  90 }