update

src/c1/threePoints.cpp

@@ -1,23 +1,25 @@
 #include <cmath>
+#include <cstdlib>
+#include <format>
 #include<glad/glad.h>
 #include<GLFW/glfw3.h>
 #include <chrono>
 #include <iostream>
+#include <ostream>
 #include <stdexcept>
 #include <thread>
 
 const float POINT_SIZE = 32.0f;
 
+
 void render(){
     glBegin(GL_TRIANGLES);
-
     glColor3f(1.0f,0.0f,0.0f);
     glVertex3f(0.0f,0.5f,0.0f);
     glColor3f(0.0f,1.0f,0.0f);
     glVertex3f(-0.5,-0.5,0.0f);
     glColor3f(0.0f,0.0f,1.0f);
     glVertex3f(0.5f,-0.5f,0.0f);
-
     glEnd();
 
     glBegin(GL_POINTS);
@@ -31,10 +33,16 @@ void render(){
         num=0.0f;
         speed=0.01f;
     }
-    
+    glColor3f(num/1.11f,1.0f-(num/1.12f),num/1.13f);
-    glColor3f(num,num,num);
+    static int bx=0,by=0,bsx=5,bsy=7;
-    glVertex3f(0.0f,0.0f,0.0f);
+    glVertex3f(float(bx)/1000.0f,float(by)/1000.0f,0.0f);
-
+    bx+=bsx,by+=bsy;
+    if(bx>=1000||bx<=-1000){
+        bsx=-bsx;
+    }
+    if(by>=1000||by<=-1000){
+        bsy=-bsy;
+    }
     glEnd();
 }
 
@@ -59,17 +67,17 @@ int main(){
     
     std::cout<<"OpenGL version:"<<glGetString(GL_VERSION)<<"\n";
 
-    glClear(GL_COLOR_BUFFER_BIT);
     glEnable(GL_POINT_SMOOTH);
     glEnable(GL_BLEND);
     glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
     glPointSize(POINT_SIZE);
 
     while(glfwWindowShouldClose(window)==false){
+        glClear(GL_COLOR_BUFFER_BIT);
         render();
         glfwSwapBuffers(window);
         glfwPollEvents();
-        std::this_thread::sleep_for(std::chrono::milliseconds(1000/60));
+        std::this_thread::sleep_for(std::chrono::milliseconds(1000/120));
     }
     return 0;
 }