track creature with camera

[blobs.git] / src / graphics / viewport.cpp

diff --git a/src/graphics/viewport.cpp b/src/graphics/viewport.cpp
index ac0b9e5c5b7c1516ea2795f615f581bc50861c4a..398eb42ef1b786d3d57581a9b9f4e6a8244cf5ee 100644 (file)
--- a/src/graphics/viewport.cpp
+++ b/src/graphics/viewport.cpp
@@ -1,8 +1,10 @@
 #include "Camera.hpp"
 #include "Viewport.hpp"
 
+#include "../creature/Creature.hpp"
 #include "../math/const.hpp"
 #include "../world/Body.hpp"
+#include "../world/Planet.hpp"
 
 #include <cmath>
 #include <GL/glew.h>
@@ -84,24 +86,34 @@ Camera &Camera::MapView(int srf, const glm::vec3 &pos, float roll) noexcept {
 
        float dir = srf < 3 ? 1.0f : -1.0f;
 
-       glm::vec3 position;
-       position[(srf + 0) % 3] = pos.x;
-       position[(srf + 1) % 3] = pos.y;
-       position[(srf + 2) % 3] = dir * (pos.z + Reference().Radius());
-
        glm::vec3 up(0.0f);
-       up[(srf + 0) % 3] = std::cos(roll);
-       up[(srf + 1) % 3] = std::sin(roll);
+       up[(srf + 0) % 3] = std::sin(roll);
+       up[(srf + 1) % 3] = std::cos(roll);
        up[(srf + 2) % 3] = 0.0f;
 
-       glm::vec3 target = position;
+       glm::vec3 target = pos;
        target[(srf + 2) % 3] -= dir;
 
-       view = glm::lookAt(position, target, up);
+       view = glm::lookAt(pos, target, up);
 
        return *this;
 }
 
+Camera &Camera::TopDown(const creature::Creature &c, float distance, float roll) {
+       const creature::Situation &s = c.GetSituation();
+       if (s.OnPlanet()) {
+               int srf = s.Surface();
+               glm::vec3 pos(s.Position());
+               pos[(srf + 2) % 3] += srf < 3 ? distance : -distance;
+               Reference(s.GetPlanet());
+               return MapView(srf, pos, roll);
+       } else {
+               glm::vec3 pos(s.Position());
+               pos += glm::normalize(pos) * distance;
+               return Orbital(pos);
+       }
+}
+
 Camera &Camera::Orbital(const glm::vec3 &pos) noexcept {
        track_orient = false;
        view = glm::lookAt(pos, glm::vec3(0.0f), glm::vec3(0.0f, 1.0f, 0.0f));