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Author: Archive (posted 2017-02-27 19:41:49, viewed 434 times)

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package ffp_examples;

import static ffp.FFP.*;

import eutLE.EUTInput;

public class rotate extends eutvideo {

   public static void main(String[] args) {
      eut_video_create(EUT_RGB | EUT_STATIC | EUT_NOT_RESIZABLE, new rotate());
   }

   static int dmtex_width = 64;
   static int dmtex_height = 64;
   static int[] dmtex = new int[dmtex_width * dmtex_height];
   static float rot = 0;
   static float xt = 0;
   static float yt = 0;

   static void gen_textures() {
      for (int i = 0; i < dmtex_width; i++) {
         float ti = (float) (2.0 * Math.PI * i / dmtex_width);
         for (int j = 0; j < dmtex_height; j++) {
            float tj = (float) (2.0 * Math.PI * j / dmtex_height);
            dmtex[j + i * dmtex_width] = (int) (127 * (1.0 + Math.sin(ti))) << 16 | (int) (127 * (1.0 + Math.cos(2 * tj))) << 8 | (int) (127 * (1.0 + Math.cos(ti + tj)));
         }
      }
   }

   public static void reshape(int w, int h) {
      ffpViewport(0, 0, w, h);
      create_projection(w, h);
   }

   private static void create_projection(int w, int h) {
      ffpMatrixMode(FFP_PROJECTION);
      ffpLoadIdentity();
      float v = 1f;
      if (w <= h) {
         ffpOrtho(0.0f, v, 0.0f, v * h / w, -10.0f, 10.0f);
      } else {
         ffpOrtho(0.0f, v * w / h, 0.0f, v, -10.0f, 10.0f);
      }
      ffpMatrixMode(FFP_MODELVIEW);
      ffpLoadIdentity();
   }

   @Override
   public void eut_init(int video_mode) {
      reshape(window_width, window_height);
      ffpVideoClearColor(0, 0, 0);
      ffpShadeModel(FFP_FLAT);
      ffpEnable(FFP_DEPTH_TEST);
      ffpEnable(FFP_TEXTURE);

      gen_textures();
      ffpBindTexture(FFP_TEXTURE, 0);
      ffpTexParameteri(FFP_TEXTURE, FFP_TEXTURE_FILTER, FFP_NEAREST);
      ffpTexLoadPixels(FFP_TEXTURE, dmtex, dmtex_width, dmtex_height);
   }

   @Override
   public void exm_update() {
      int x = EUTInput.mouse_x();
      int y = EUTInput.mouse_y();
      if (EUTInput.mouse_left_button_active()) {
         xt = (float) x / window_width;
         yt = (float) -y / window_height;
      }
      if (EUTInput.key_pressed(KEY_T)) {
         boolean state = ffpIsEnabled(FFP_TEXTURE);
         if (state) {
            ffpDisable(FFP_TEXTURE);
         } else {
            ffpEnable(FFP_TEXTURE);
         }
      }

      rot += 0.2f;
   }

   @Override
   public void eut_render() {
      ffpClear(FFP_VIDEO_MEMORY | FFP_DEPTH_MEMORY);
      ffpPushMatrix();
      ffpTranslatef(xt - 0.25f, yt + 0.75f, 0);
      {
         ffpBindTexture(FFP_TEXTURE, 0);
         ffpScalef(0.5f, 0.5f, 0.5f);
         ffpTranslatef(0.5f, 0.5f, 0);
         ffpRotatef(rot, 0, 0, 1);
         ffpTranslatef(-0.5f, -0.5f, 0);
         ffpBegin(FFP_QUADS);
         ffpTexCoord2f(0.0f, 0.0f);
         ffpVertex2f(0.0f, 0.0f);
         ffpTexCoord2f(0.0f, 1f);
         ffpVertex2f(0.0f, 1.0f);
         ffpTexCoord2f(1f, 1f);
         ffpVertex2f(1.0f, 1.0f);
         ffpTexCoord2f(1f, 0.0f);
         ffpVertex2f(1.0f, 0.0f);
         ffpEnd();
      }
      ffpPopMatrix();
      ffpFlush(FFP_MULTI_THREADED);
   }

   @Override
   public void eut_resize(int wnd_width, int wnd_height) {
      if (wnd_width <= window_width && wnd_height <= window_height) {
         bind_video(0, 0, wnd_width, wnd_height);
      }
      create_projection(wnd_width, wnd_height);
   }

   @Override
   public void eut_exit() {
      ffpDeleteAllTextures();
   }

}





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