up down is broken

src/main.cpp

@@ -3,12 +3,14 @@
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_main.h>
 #include <cmath>
+#include <string>
 #include <algorithm>
 
 #include "globals.hpp"
 #include "math.hpp"
 #include "renderer/camera.hpp"
 #include "renderer/calls.hpp"
+#include "player.hpp"
 
 static SDL_Window *window = NULL;
 static SDL_Renderer *renderer = NULL;
@@ -16,6 +18,10 @@ static SDL_Renderer *renderer = NULL;
 DeltaVector2 temp1(125, 150), temp2(150, 120), temp3(100, 100);
 DeltaVector2 topleft, bottomright, p;
 
+Player player = Player(70, 110, 20);
+
+double prev = 0, now = 0, deltaTime;
+
 SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
 {
     SDL_SetAppMetadata("delta engine game", "0.0", "com.miletici.game");
@@ -39,21 +45,44 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
     if (event->type == SDL_EVENT_QUIT) {
         return SDL_APP_SUCCESS;
     }
+
+    if (event->type == SDL_EVENT_KEY_DOWN) {
+        if (event->key.scancode == SDL_SCANCODE_ESCAPE) return SDL_APP_SUCCESS;
+    }
+
     return SDL_APP_CONTINUE;
 }
 
 SDL_AppResult SDL_AppIterate(void *appstate)
 {
-    const double now = ((double)SDL_GetTicks()) / 1000.0;
+    now = ((double)SDL_GetTicks()) / 1000.0;
+    deltaTime = now - prev;
+
+    SDL_SetWindowTitle(window, std::to_string((int)(1 / deltaTime)).c_str());
     
+    player.update(deltaTime);
+
+    // drawing starts here
+
     SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE_FLOAT);
     SDL_RenderClear(renderer);
 
     SDL_SetRenderDrawColor(renderer, 255, 0, 255, SDL_ALPHA_OPAQUE);
-    rasterizeTriangle(renderer, temp1, temp2, temp3);
+    // rasterizeTriangle(renderer, temp1, temp2, temp3);
+
+    DeltaVector2 rendered = player.camera.projectPointVec({ 40, 10, 30 });
+    SDL_RenderPoint(renderer, rendered.x, rendered.y);
+    rendered = player.camera.projectPointVec({ 40, 210, 30 });
+    SDL_RenderPoint(renderer, rendered.x, rendered.y);
+    rendered = player.camera.projectPointVec({ 40, 10, -170 });
+    SDL_RenderPoint(renderer, rendered.x, rendered.y);
+    rendered = player.camera.projectPointVec({ 40, 210, -170 });
+    SDL_RenderPoint(renderer, rendered.x, rendered.y);
 
     SDL_RenderPresent(renderer);
 
+    prev = now;
+
     return SDL_APP_CONTINUE;
 }