Start adding controls to the test

s3l.h

@@ -1175,6 +1175,9 @@ void S3L_drawTriangle(S3L_Vec4 point0, S3L_Vec4 point1, S3L_Vec4 point2,
   const S3L_DrawConfig *config, const S3L_Camera *camera,
   S3L_Index triangleID)
 {
+  if (point0.z <= 0 && point1.z <= 0 && point2.z <= 0)
+    return; // completely behind the camera
+
   if (config->backfaceCulling != S3L_BACKFACE_CULLING_NONE)
   {
     int32_t winding = // determines CW or CCW
@@ -1312,11 +1315,29 @@ void S3L_makeWorldMatrix(S3L_Transform3D worldTransform, S3L_Mat4 *m)
 
 void S3L_makeCameraMatrix(S3L_Transform3D cameraTransform, S3L_Mat4 *m)
 {
+/*
   S3L_makeTranslationMat(
     -1 * cameraTransform.translation.x,
     -1 * cameraTransform.translation.y,
     -1 * cameraTransform.translation.z,
     m);
+*/
+
+  S3L_makeTranslationMat(
+    -1 * cameraTransform.translation.x,
+    -1 * cameraTransform.translation.y,
+    -1 * cameraTransform.translation.z,
+    m);
+
+  S3L_Mat4 r;
+
+  S3L_makeRotationMatrix(
+    cameraTransform.rotation.x,
+    cameraTransform.rotation.y,
+    cameraTransform.rotation.z,
+    &r);
+
+  S3L_mat4Xmat4(m,&r);
 }
 
 static inline void S3L_zDivide(S3L_Vec4 *vector)

testSDL.c

@@ -34,6 +34,8 @@ const S3L_Unit ver[] = { S3L_CUBE_VERTICES };
 const S3L_Index tri[] = { S3L_CUBE_TRIANGLES };
 const S3L_Unit tex_coords[] = { S3L_CUBE_TEXCOORDS };
 
+int8_t keys[256];
+
 const uint8_t testTexture[] =
 {
   2,2,2,0,0,0,2,2,2,2,0,0,0,2,2,2,
@@ -134,8 +136,8 @@ void draw()
   modelTransform.rotation.z = f * 0.1;
   modelTransform.rotation.x = f * 0.3;
 
-  modelTransform.translation.x = sin(f >> 7) * 700;
+//  modelTransform.translation.x = sin(f >> 7) * 700;
-  modelTransform.translation.y = sin(f >> 8) * 600;
+//  modelTransform.translation.y = sin(f >> 8) * 600;
 
   S3L_drawModelIndexed(ver,tri,12,modelTransform,&camera,&conf);
 
@@ -203,6 +205,9 @@ int main()
 
   int running = 1;
 
+  for (int i = 0; i < 256; ++i)
+    keys[i] = 0;
+
   while (running)
   {
     draw();
@@ -216,11 +221,45 @@ int main()
           running = 0;
           break;
 
+        case SDL_KEYDOWN:
+          keys['a' + event.key.keysym.scancode - SDL_SCANCODE_A] = 1;
+          break;
+
+        case SDL_KEYUP:
+          keys['a' + event.key.keysym.scancode - SDL_SCANCODE_A] = 0;
+          break;
+
         default:
           break;
       }
     }
 
+    int step = 10;
+
+    if (keys['w'])
+      camera.transform.translation.z += step;
+
+    if (keys['s'])
+      camera.transform.translation.z -= step;
+
+    if (keys['a'])
+      camera.transform.translation.x -= step;
+
+    if (keys['d'])
+      camera.transform.translation.x += step;
+
+    if (keys['x'])
+      camera.transform.translation.y += step;
+
+    if (keys['c'])
+      camera.transform.translation.y -= step;
+
+    if (keys['q'])
+      camera.transform.rotation.y -= 1;
+
+    if (keys['e'])
+      camera.transform.rotation.y += 1;
+
     SDL_RenderClear(renderer);
     SDL_RenderCopy(renderer,texture,NULL,NULL);
     SDL_RenderPresent(renderer);