AABB block hitboxes

src/content/Content.cpp

@@ -1,9 +1,11 @@
 #include "Content.h"
 
 #include <stdexcept>
+#include <glm/glm.hpp>
 
 #include "../voxels/Block.h"
 
+using glm::vec3;
 using std::vector;
 using std::string;
 using std::unordered_map;
@@ -21,6 +23,24 @@ Content* ContentBuilder::build() {
     for (const string& name : blockIds) {
         Block* def = blockDefs[name];
         def->id = blockDefsIndices.size();
+        def->rt.emissive = *((uint32_t*)def->emission);
+        
+        // build hitbox grid 3d for raycasts
+        const AABB& hitbox = def->hitbox;
+        for (uint gy = 0; gy < BLOCK_AABB_GRID; gy++) {
+            for (uint gz = 0; gz < BLOCK_AABB_GRID; gz++) {
+                for (uint gx = 0; gx < BLOCK_AABB_GRID; gx++) {
+                    float x = gx / float(BLOCK_AABB_GRID);
+                    float y = gy / float(BLOCK_AABB_GRID);
+                    float z = gz / float(BLOCK_AABB_GRID);
+                    bool flag = hitbox.inside({x, y, z});
+                    if (!flag)
+                        def->rt.solid = false;
+                    def->rt.hitboxGrid[gy][gz][gx] = flag;
+                }
+            }
+        }
+
         blockDefsIndices.push_back(def);
     }
     ContentIndices* indices = new ContentIndices(blockDefsIndices);