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lugaru/Source/Graphic/Decal.cpp

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+/*
+Copyright (C) 2003, 2010 - Wolfire Games
+Copyright (C) 2010-2017 - Lugaru contributors (see AUTHORS file)
+
+This file is part of Lugaru.
+
+Lugaru is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+Lugaru is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Lugaru.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "Graphic/Decal.hpp"
+
+#include "Environment/Terrain.hpp"
+#include "Graphic/Models.hpp"
+
+Decal::Decal()
+    : position()
+    , type(shadowdecal)
+    , opacity(0)
+    , rotation(0)
+    , alivetime(0)
+    , brightness(0)
+{
+}
+
+Decal::Decal(XYZ _position, decal_type _type, float _opacity, float _rotation, float _brightness, int whichx, int whichy, float size, const Terrain& terrain, bool first)
+    : position(_position)
+    , type(_type)
+    , opacity(_opacity)
+    , rotation(_rotation)
+    , alivetime(0)
+    , brightness(_brightness)
+{
+    float placex, placez;
+    placex = (float)whichx * terrain.scale + terrain.scale;
+    placez = (float)whichy * terrain.scale;
+
+    texcoords[0][0] = (placex - position.x) / size / 2 + .5;
+    texcoords[0][1] = (placez - position.z) / size / 2 + .5;
+
+    vertex[0].x = placex;
+    vertex[0].z = placez;
+    vertex[0].y = terrain.heightmap[whichx + 1][whichy] * terrain.scale + .01;
+
+    if (first) {
+        placex = (float)whichx * terrain.scale + terrain.scale;
+        placez = (float)whichy * terrain.scale + terrain.scale;
+    } else {
+        placex = (float)whichx * terrain.scale;
+        placez = (float)whichy * terrain.scale;
+    }
+
+    texcoords[1][0] = (placex - position.x) / size / 2 + .5;
+    texcoords[1][1] = (placez - position.z) / size / 2 + .5;
+
+    vertex[1].x = placex;
+    vertex[1].z = placez;
+    if (first) {
+        vertex[1].y = terrain.heightmap[whichx + 1][whichy + 1] * terrain.scale + .01;
+    } else {
+        vertex[1].y = terrain.heightmap[whichx][whichy] * terrain.scale + .01;
+    }
+
+    placex = (float)whichx * terrain.scale;
+    placez = (float)whichy * terrain.scale + terrain.scale;
+
+    texcoords[2][0] = (placex - position.x) / size / 2 + .5;
+    texcoords[2][1] = (placez - position.z) / size / 2 + .5;
+
+    vertex[2].x = placex;
+    vertex[2].z = placez;
+    vertex[2].y = terrain.heightmap[whichx][whichy + 1] * terrain.scale + .01;
+
+    XYZ rot;
+    if (rotation) {
+        for (int i = 0; i < 3; i++) {
+            rot.y = 0;
+            rot.x = texcoords[i][0] - .5;
+            rot.z = texcoords[i][1] - .5;
+            rot = DoRotation(rot, 0, -rotation, 0);
+            texcoords[i][0] = rot.x + .5;
+            texcoords[i][1] = rot.z + .5;
+        }
+    }
+}
+
+Decal::Decal(XYZ _position, decal_type _type, float _opacity, float _rotation, float size, const Model& model, int i, int which)
+    : position(_position)
+    , type(_type)
+    , opacity(_opacity)
+    , rotation(_rotation)
+    , alivetime(0)
+    , brightness(0)
+{
+    float placex, placez;
+    if (which == 0) {
+        placex = model.getTriangleVertex(i, 0).x;
+        placez = model.getTriangleVertex(i, 0).z;
+
+        texcoords[0][0] = (placex - position.x) / (size) / 2 + .5;
+        texcoords[0][1] = (placez - position.z) / (size) / 2 + .5;
+
+        vertex[0].x = placex;
+        vertex[0].z = placez;
+        vertex[0].y = model.getTriangleVertex(i, 0).y;
+
+        placex = model.getTriangleVertex(i, 1).x;
+        placez = model.getTriangleVertex(i, 1).z;
+
+        texcoords[1][0] = (placex - position.x) / (size) / 2 + .5;
+        texcoords[1][1] = (placez - position.z) / (size) / 2 + .5;
+
+        vertex[1].x = placex;
+        vertex[1].z = placez;
+        vertex[1].y = model.getTriangleVertex(i, 1).y;
+
+        placex = model.getTriangleVertex(i, 2).x;
+        placez = model.getTriangleVertex(i, 2).z;
+
+        texcoords[2][0] = (placex - position.x) / (size) / 2 + .5;
+        texcoords[2][1] = (placez - position.z) / (size) / 2 + .5;
+
+        vertex[2].x = placex;
+        vertex[2].z = placez;
+        vertex[2].y = model.getTriangleVertex(i, 2).y;
+    } else if (which == 1) {
+        placex = model.getTriangleVertex(i, 0).y;
+        placez = model.getTriangleVertex(i, 0).z;
+
+        texcoords[0][0] = (placex - position.y) / (size) / 2 + .5;
+        texcoords[0][1] = (placez - position.z) / (size) / 2 + .5;
+
+        vertex[0].x = model.getTriangleVertex(i, 0).x;
+        vertex[0].z = placez;
+        vertex[0].y = placex;
+
+        placex = model.getTriangleVertex(i, 1).y;
+        placez = model.getTriangleVertex(i, 1).z;
+
+        texcoords[1][0] = (placex - position.y) / (size) / 2 + .5;
+        texcoords[1][1] = (placez - position.z) / (size) / 2 + .5;
+
+        vertex[1].x = model.getTriangleVertex(i, 1).x;
+        vertex[1].z = placez;
+        vertex[1].y = placex;
+
+        placex = model.getTriangleVertex(i, 2).y;
+        placez = model.getTriangleVertex(i, 2).z;
+
+        texcoords[2][0] = (placex - position.y) / (size) / 2 + .5;
+        texcoords[2][1] = (placez - position.z) / (size) / 2 + .5;
+
+        vertex[2].x = model.getTriangleVertex(i, 2).x;
+        vertex[2].z = placez;
+        vertex[2].y = placex;
+    } else {
+        placex = model.getTriangleVertex(i, 0).x;
+        placez = model.getTriangleVertex(i, 0).y;
+
+        texcoords[0][0] = (placex - position.x) / (size) / 2 + .5;
+        texcoords[0][1] = (placez - position.y) / (size) / 2 + .5;
+
+        vertex[0].x = placex;
+        vertex[0].z = model.getTriangleVertex(i, 0).z;
+        vertex[0].y = placez;
+
+        placex = model.getTriangleVertex(i, 1).x;
+        placez = model.getTriangleVertex(i, 1).y;
+
+        texcoords[1][0] = (placex - position.x) / (size) / 2 + .5;
+        texcoords[1][1] = (placez - position.y) / (size) / 2 + .5;
+
+        vertex[1].x = placex;
+        vertex[1].z = model.getTriangleVertex(i, 1).z;
+        vertex[1].y = placez;
+
+        placex = model.getTriangleVertex(i, 2).x;
+        placez = model.getTriangleVertex(i, 2).y;
+
+        texcoords[2][0] = (placex - position.x) / (size) / 2 + .5;
+        texcoords[2][1] = (placez - position.y) / (size) / 2 + .5;
+
+        vertex[2].x = placex;
+        vertex[2].z = model.getTriangleVertex(i, 2).z;
+        vertex[2].y = placez;
+    }
+}