kc3-lang/angle/samples/gles1/SimpleLighting.cpp

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• Author : Jamie Madill
  Date : 2020-08-28 14:45:14
  Hash : 5c56f228
  Message : Enable two override suggestion warnings. -Wsuggest-destructor-override and -Wsuggest-override. Bug: skia:7647 Change-Id: Iaac1baa8f34fdf210baf2fdbe811a582b3ac2d14 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2376717 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

• samples/gles1/SimpleLighting.cpp

• //
  // Copyright 2018 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  //            Based on Hello_Triangle.c from
  // Book:      OpenGL(R) ES 2.0 Programming Guide
  // Authors:   Aaftab Munshi, Dan Ginsburg, Dave Shreiner
  // ISBN-10:   0321502795
  // ISBN-13:   9780321502797
  // Publisher: Addison-Wesley Professional
  // URLs:      http://safari.informit.com/9780321563835
  //            http://www.opengles-book.com
  
  #include "SampleApplication.h"
  
  #include <algorithm>
  
  #include "util/gles_loader_autogen.h"
  
  class SimpleLightingSample : public SampleApplication
  {
    public:
      SimpleLightingSample(int argc, char **argv)
          : SampleApplication("SimpleLightingSample", argc, argv, 1, 0)
      {}
  
      bool initialize() override
      {
          glClearColor(0.4f, 0.3f, 0.2f, 1.0f);
          mRotDeg = 0.0f;
  
          return true;
      }
  
      void destroy() override {}
  
      void draw() override
      {
  
          glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
          glColor4f(0.2f, 0.6f, 0.8f, 1.0f);
  
          GLfloat mat_ambient[]  = {0.7f, 0.4f, 0.2f, 1.0f};
          GLfloat mat_specular[] = {0.5f, 0.5f, 0.5f, 1.0f};
          GLfloat mat_diffuse[]  = {0.3f, 0.4f, 0.6f, 1.0f};
          GLfloat lightpos[]     = {0.0f, 1.0f, 0.0f, 0.0f};
  
          GLfloat normals[] = {
              -0.4f, 0.4f, -0.4f, -0.4f, -0.4f, -0.4f, 0.2f, 0.0f, -0.4f,
  
              -0.4f, 0.4f, 0.4f,  -0.4f, -0.4f, 0.4f,  0.2f, 0.0f, 0.4f,
          };
  
          GLfloat vertices[] = {
              -0.5f, 0.5f, 0.0f, -0.5f, -0.5f, 0.0f, 0.5f, 0.0f, 0.0f,
  
              -0.5f, 0.5f, 0.3f, -0.5f, -0.5f, 0.3f, 0.5f, 0.0f, 0.3f,
          };
  
          GLuint indices[] = {
              0, 1, 2, 3, 4, 5,
  
              0, 4, 3, 4, 0, 1,
  
              4, 1, 2, 2, 5, 4,
  
              5, 2, 3, 3, 2, 0,
          };
  
          glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, mat_ambient);
          glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular);
          glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mat_diffuse);
  
          glEnable(GL_DEPTH_TEST);
          glEnable(GL_LIGHTING);
          glEnable(GL_LIGHT0);
          glLightfv(GL_LIGHT0, GL_POSITION, lightpos);
  
          glEnableClientState(GL_VERTEX_ARRAY);
          glEnableClientState(GL_NORMAL_ARRAY);
          glVertexPointer(3, GL_FLOAT, 0, vertices);
          glNormalPointer(GL_FLOAT, 0, normals);
  
          for (int i = 0; i < 3; i++)
          {
              for (int j = 0; j < 3; j++)
              {
                  glPushMatrix();
  
                  glTranslatef(-0.6f + i * 0.6f, -0.6f + j * 0.6f, 0.0f);
  
                  glRotatef(mRotDeg + (10.0f * (3.0f * i + j)), 0.0f, 1.0f, 0.0f);
                  glRotatef(20.0f + (20.0f * (3.0f * i + j)), 1.0f, 0.0f, 0.0f);
                  GLfloat scale = 0.5;
                  glScalef(scale, scale, scale);
                  glDrawElements(GL_TRIANGLES, 3 * 8, GL_UNSIGNED_INT, indices);
  
                  glPopMatrix();
              }
          }
  
          mRotDeg += 0.03f;
      }
  
    private:
      float mRotDeg;
  };
  
  int main(int argc, char **argv)
  {
      SimpleLightingSample app(argc, argv);
      return app.run();
  }