a bunch of shit

src/main.cpp

@@ -5,6 +5,7 @@
 #include <cmath>
 #include <string>
 #include <algorithm>
+#include <vector>
 
 #include "globals.hpp"
 #include "math.hpp"
@@ -19,11 +20,15 @@ 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_Surface* backbuffer = NULL;
+
+std::vector<DeltaTriangle> triangles;
+SDL_Texture* gpuTexture = NULL;
 
 SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
 {
+    SDL_HideCursor();
     SDL_SetAppMetadata("delta engine game", "0.0", "com.miletici.game");
 
     if (!SDL_Init(SDL_INIT_VIDEO)) {
@@ -31,11 +36,24 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
         return SDL_APP_FAILURE;
     }
 
-    if (!SDL_CreateWindowAndRenderer("game", SIMULATED_WIDTH, SIMULATED_HEIGHT, 0, &window, &renderer)) {
+    if (!SDL_CreateWindowAndRenderer("game", SIMULATED_WIDTH, SIMULATED_HEIGHT, SDL_WINDOW_FULLSCREEN, &window, &renderer)) {
         SDL_Log("Couldn't create window/renderer: %s", SDL_GetError());
         return SDL_APP_FAILURE;
     }
-    SDL_SetRenderLogicalPresentation(renderer, 640, 480, SDL_LOGICAL_PRESENTATION_LETTERBOX);
+
+    SDL_SetWindowRelativeMouseMode(window, true);
+
+    SDL_SetRenderLogicalPresentation(renderer, SIMULATED_WIDTH, SIMULATED_HEIGHT, SDL_LOGICAL_PRESENTATION_LETTERBOX);
+
+    triangles.push_back({ {40, 10, 0}, {40, 210, 0}, {40, 10, 200} });
+    backbuffer = SDL_CreateSurface(SIMULATED_WIDTH, SIMULATED_HEIGHT, SDL_PIXELFORMAT_ARGB8888);
+    gpuTexture = SDL_CreateTexture(
+        renderer, 
+        SDL_PIXELFORMAT_ARGB8888, 
+        SDL_TEXTUREACCESS_STREAMING, 
+        SIMULATED_WIDTH, 
+        SIMULATED_HEIGHT
+    );
 
     return SDL_APP_CONTINUE;  /* carry on with the program! */
 }
@@ -46,6 +64,11 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
         return SDL_APP_SUCCESS;
     }
 
+    if (event->type == SDL_EVENT_MOUSE_MOTION) {
+        player.angle.x += event->motion.xrel / 100;
+        player.angle.y += event->motion.yrel / 100;
+    }
+
     if (event->type == SDL_EVENT_KEY_DOWN) {
         if (event->key.scancode == SDL_SCANCODE_ESCAPE) return SDL_APP_SUCCESS;
     }
@@ -64,20 +87,31 @@ SDL_AppResult SDL_AppIterate(void *appstate)
 
     // drawing starts here
 
-    SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE_FLOAT);
-    SDL_RenderClear(renderer);
+    SDL_FillSurfaceRect(backbuffer, NULL, 0xFF000000); 
 
-    SDL_SetRenderDrawColor(renderer, 255, 0, 255, SDL_ALPHA_OPAQUE);
+    // SDL_SetRenderDrawColor(renderer, 255, 0, 255, SDL_ALPHA_OPAQUE);
     // 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);
+    // 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);
+
+    for (auto triangle : triangles) {
+        DeltaVector2 pointA = player.camera.projectPointVec(triangle.a), pointB = player.camera.projectPointVec(triangle.b), pointC = player.camera.projectPointVec(triangle.c);
+
+        rasterizeTriangleFast(backbuffer, pointA, pointB, pointC, SDLColorToUint32({ 255, 0, 255, 255 }));
+    }
+
+    SDL_UpdateTexture(gpuTexture, NULL, backbuffer->pixels, backbuffer->pitch);
+    
+    SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+    SDL_RenderClear(renderer);
+    SDL_RenderTexture(renderer, gpuTexture, NULL, NULL);
 
     SDL_RenderPresent(renderer);