stair shape

[blank.git] / src / shape.cpp

diff --git a/src/shape.cpp b/src/shape.cpp
index e974d068c0d494cf3c051b980a63e3b31837c826..3df425785d5eb922948cdccd31b80ad638db6d23 100644 (file)
--- a/src/shape.cpp
+++ b/src/shape.cpp
@@ -101,4 +101,167 @@ bool CuboidShape::Intersects(const Ray &ray, const glm::mat4 &M, float &dist, gl
        return Intersection(ray, bb, M, &dist, &normal);
 }
 
+
+StairShape::StairShape(const AABB &bb, const glm::vec2 &clip)
+: top({ { clip.x, clip.y, bb.min.z }, bb.max })
+, bot({ bb.min, { bb.max.x, clip.y, bb.max.z } }) {
+
+}
+
+
+size_t StairShape::VertexCount() const {
+       return 60;
+}
+
+void StairShape::Vertices(std::vector<glm::vec3> &out, const glm::vec3 &pos) const {
+       out.reserve(60);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.min.y, pos.z + top.max.z); // front, upper
+       out.emplace_back(pos.x + top.max.x, pos.y + top.min.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.min.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.max.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.max.z); // front, lower
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.min.y, pos.z + top.min.z); // back, upper
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.min.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.min.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.max.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.min.z); // back, lower
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.min.z); // top, upper
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.max.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.max.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.max.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.min.z); // top, lower
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.min.z); // bottom
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.min.y, pos.z + top.min.z); // left, upper
+       out.emplace_back(pos.x + top.min.x, pos.y + top.min.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.min.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + top.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.min.z); // left, lower
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.min.z); // right
+       out.emplace_back(pos.x + top.max.x, pos.y + top.max.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.max.y, pos.z + top.min.z);
+       out.emplace_back(pos.x + top.max.x, pos.y + top.max.y, pos.z + top.max.z);
+}
+
+void StairShape::Normals(std::vector<glm::vec3> &out) const {
+       out.reserve(60);
+       out.insert(out.end(), 12, glm::vec3( 0.0f,  0.0f,  1.0f)); // front, x2
+       out.insert(out.end(), 12, glm::vec3( 0.0f,  0.0f, -1.0f)); // back, x2
+       out.insert(out.end(), 12, glm::vec3( 0.0f,  1.0f,  0.0f)); // top, x2
+       out.insert(out.end(),  6, glm::vec3( 0.0f, -1.0f,  0.0f)); // bottom
+       out.insert(out.end(), 12, glm::vec3(-1.0f,  0.0f,  0.0f)); // left, x2
+       out.insert(out.end(),  6, glm::vec3( 1.0f,  0.0f,  0.0f)); // right
+}
+
+
+size_t StairShape::OutlineCount() const {
+       return 36;
+}
+
+void StairShape::Outline(std::vector<glm::vec3> &out, const glm::vec3 &pos) const {
+       out.reserve(36);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.min.z); // bottom
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.min.z); // middle
+       out.emplace_back(pos.x + top.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + bot.min.z); // top
+       out.emplace_back(pos.x + bot.max.x, pos.y + top.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + top.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + top.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + top.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.min.z); // verticals, ltr/btf
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.min.x, pos.y + bot.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.min.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + top.min.x, pos.y + top.max.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + top.max.y, pos.z + bot.min.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + bot.min.y, pos.z + bot.max.z);
+       out.emplace_back(pos.x + bot.max.x, pos.y + top.max.y, pos.z + bot.max.z);
+}
+
+bool StairShape::Intersects(const Ray &ray, const glm::mat4 &M, float &dist, glm::vec3 &norm) const {
+       float top_dist, bot_dist;
+       glm::vec3 top_norm, bot_norm;
+       bool top_hit = Intersection(ray, top, M, &top_dist, &top_norm);
+       bool bot_hit = Intersection(ray, bot, M, &bot_dist, &bot_norm);
+
+       if (top_hit) {
+               if (bot_hit) {
+                       if (top_dist < bot_dist) {
+                               dist = top_dist;
+                               norm = top_norm;
+                               return true;
+                       } else {
+                               dist = bot_dist;
+                               norm = bot_norm;
+                               return true;
+                       }
+               } else {
+                       dist = top_dist;
+                       norm = top_norm;
+                       return true;
+               }
+       } else if (bot_hit) {
+               dist = bot_dist;
+               norm = bot_norm;
+               return true;
+       } else {
+               return false;
+       }
+}
+
+
 }