abstract block shape

[blank.git] / src / shape.cpp

diff --git a/src/shape.cpp b/src/shape.cpp
new file mode 100644 (file)
index 0000000..e974d06
--- /dev/null
+++ b/src/shape.cpp
@@ -0,0 +1,104 @@
+#include "shape.hpp"
+
+
+namespace blank {
+
+CuboidShape::CuboidShape(const AABB &b)
+: Shape()
+, bb(b) {
+       bb.Adjust();
+}
+
+
+size_t CuboidShape::VertexCount() const {
+       return 36;
+}
+
+void CuboidShape::Vertices(std::vector<glm::vec3> &out, const glm::vec3 &pos) const {
+       out.reserve(36);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.max.z); // front
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.min.z); // back
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.min.z); // top
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.min.z); // bottom
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.min.z); // left
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.min.z); // right
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.max.z);
+}
+
+void CuboidShape::Normals(std::vector<glm::vec3> &out) const {
+       out.reserve(36);
+       out.insert(out.end(), 6, glm::vec3( 0.0f,  0.0f,  1.0f)); // front
+       out.insert(out.end(), 6, glm::vec3( 0.0f,  0.0f, -1.0f)); // back
+       out.insert(out.end(), 6, glm::vec3( 0.0f,  1.0f,  0.0f)); // top
+       out.insert(out.end(), 6, glm::vec3( 0.0f, -1.0f,  0.0f)); // bottom
+       out.insert(out.end(), 6, glm::vec3(-1.0f,  0.0f,  0.0f)); // left
+       out.insert(out.end(), 6, glm::vec3( 1.0f,  0.0f,  0.0f)); // right
+}
+
+
+size_t CuboidShape::OutlineCount() const {
+       return 24;
+}
+
+void CuboidShape::Outline(std::vector<glm::vec3> &out, const glm::vec3 &pos) const {
+       out.reserve(24);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.min.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.min.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.max.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.max.y, pos.z + bb.max.z);
+       out.emplace_back(pos.x + bb.min.x, pos.y + bb.min.y, pos.z + bb.max.z);
+}
+
+bool CuboidShape::Intersects(const Ray &ray, const glm::mat4 &M, float &dist, glm::vec3 &normal) const {
+       return Intersection(ray, bb, M, &dist, &normal);
+}
+
+}