Added AABB class, doing frustum culling based screen space AABB based on chunks 8 extreme points (min/max height per corner)

2026-04-22 11:18:22 -05:00 · 2016-05-13 15:15:08 -04:00
parent 4c3604420e
commit ca968b8589
20 changed files with 376 additions and 72 deletions
@@ -0,0 +1,102 @@
+/*****************************************************************************************
+*                                                                                       *
+* OpenSpace                                                                             *
+*                                                                                       *
+* Copyright (c) 2014-2016                                                               *
+*                                                                                       *
+* Permission is hereby granted, free of charge, to any person obtaining a copy of this  *
+* software and associated documentation files (the "Software"), to deal in the Software *
+* without restriction, including without limitation the rights to use, copy, modify,    *
+* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to    *
+* permit persons to whom the Software is furnished to do so, subject to the following   *
+* conditions:                                                                           *
+*                                                                                       *
+* The above copyright notice and this permission notice shall be included in all copies *
+* or substantial portions of the Software.                                              *
+*                                                                                       *
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,   *
+* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A         *
+* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT    *
+* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF  *
+* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE  *
+* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                                         *
+****************************************************************************************/
+
+
+#include <modules/globebrowsing/rendering/aabb.h>
+
+#include <string>
+
+namespace {
+    const std::string _loggerCat = "AABB";
+}
+
+namespace openspace {
+
+
+    AABB2::AABB2() : min(1e35), max(-1e35) { }
+    AABB2::AABB2(const vec2& min, const vec2& max) : min(min), max(max) { }
+
+    void AABB2::expand(const vec2& p) {
+        min.x = glm::min(min.x, p.x);
+        min.y = glm::min(min.y, p.y);
+        max.x = glm::max(max.x, p.x);
+        max.y = glm::max(max.y, p.y);
+    }
+
+    vec2 AABB2::center() const {
+        return 0.5f * (min + max);
+    }
+
+    vec2 AABB2::size() const {
+        return max - min;
+    }
+
+    bool AABB2::intersects(const vec2& p) const {
+        return (min.x < p.x) && (p.x < max.x)
+            && (min.y < p.y) && (p.y < max.y);
+    }
+
+    bool AABB2::intersects(const AABB2& o) const {
+        return (min.x < o.max.x) && (o.min.x < max.x)
+            && (min.y < o.max.y) && (o.min.y < max.y);
+    }
+
+
+
+
+
+    AABB3::AABB3() : min(1e35), max(-1e35) { }
+    AABB3::AABB3(const vec3& min, const vec3& max) : min(min), max(max) { }
+
+    void AABB3::expand(const vec3 p) {
+        min.x = glm::min(min.x, p.x);
+        min.y = glm::min(min.y, p.y);
+        min.z = glm::min(min.z, p.z);
+        max.x = glm::max(max.x, p.x);
+        max.y = glm::max(max.y, p.y);
+        max.z = glm::max(max.z, p.z);
+    }
+
+    vec3 AABB3::center() const {
+        return 0.5f * (min + max);
+    }
+
+    vec3 AABB3::size() const {
+        return max - min;
+    }
+
+    bool AABB3::intersects(const vec3& p) const {
+        return (min.x < p.x) && (p.x < max.x)
+            && (min.y < p.y) && (p.y < max.y)
+            && (min.z < p.z) && (p.z < max.z);
+    }
+
+    bool AABB3::intersects(const AABB3& o) const {
+        return (min.x < o.max.x) && (o.min.x < max.x)
+            && (min.y < o.max.y) && (o.min.y < max.y)
+            && (min.z < o.max.z) && (o.min.z < max.z);
+    }
+
+
+}  // namespace openspace