这是我当前的代码：
所有包含
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.label import Label
class SimpleApp(App):
def build(self):
self.label = Label(text="You have found yourself in a dungeon,\nsomewhere is your escape path,\nwill you make it out, and if so, what with?")
self.button = Button(text="Press Me", on_press=self.on_clicked, size_hint=(1.0, None))
layout = BoxLayout(orientation="vertical")
layout.add_widget(self.label)
layout.add_widget(self.button)
return layout
def on_clicked(self, instance):
self.label.text = "These are the basic controls-\nThe controls-\nA- approach enemy/ attack enemy\nC- Go to chest"
if __name__ == "__main__":
SimpleApp().run()
无效我的功能
#define GLEW_STATIC
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <math.h>
#include <stdio.h>
#include <iostream>
#include<conio.h>
#include<dos.h>
#include <GL/glew.h>
#include "SceneOpenGL.h"
#include <SDL2/SDL_image.h>
using namespace std;
#ifdef WIN32
#include <GL/glew.h>
#else
#define GL3_PROTOTYPES 1
#include <GL3/gl3.h>
#endif
#include <SDL2/SDL.h>
#include <iostream>
主要功能
void DrawCircle(float cx, float cy, float r, int num_segments);
void DrawEllipse(float cx, float cy, float a, float b, int num_segments);
void Rotation(float a,float b,float r, float g_theta );
带有圆形和椭圆形显示的主循环
int main(int argc, char **argv)
{
SDL_Window* fenetre(0);
SDL_GLContext contexteOpenGL(0);
SDL_Event evenements;
bool terminer(false);
if(SDL_Init(SDL_INIT_VIDEO) < 0)
{
std::cout << "Erreur lors de l'initialisation de la SDL : " << SDL_GetError() << std::endl;
SDL_Quit();
return -1;
}
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
fenetre = SDL_CreateWindow("Test SDL 2.0", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 600, 600, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
if(fenetre == 0)
{
std::cout << "Erreur lors de la creation de la fenetre : " << SDL_GetError() << std::endl;
SDL_Quit();
return -1;
}
contexteOpenGL = SDL_GL_CreateContext(fenetre);
if(contexteOpenGL == 0)
{
std::cout << SDL_GetError() << std::endl;
SDL_DestroyWindow(fenetre);
SDL_Quit();
return -1;
}
#ifdef WIN32
GLenum initialisationGLEW( glewInit() );
if(initialisationGLEW != GLEW_OK)
{
std::cout << "Erreur d'initialisation de GLEW : " << glewGetErrorString(initialisationGLEW) << std::endl;
SDL_GL_DeleteContext(contexteOpenGL);
SDL_DestroyWindow(fenetre);
SDL_Quit();
return -1;
}
#endif
创建圆的功能
while(!terminer)
{
SDL_WaitEvent(&evenements);
if(evenements.window.event == SDL_WINDOWEVENT_CLOSE)
terminer = true;
glClear(GL_COLOR_BUFFER_BIT);
float g_theta = 0.0f;
while (g_theta<360)
{
glClear(GL_COLOR_BUFFER_BIT);
g_theta += 1.0f;
DrawCircle(0, 0, 0.3, 50);
Rotation(0.8,0.65,0.1,g_theta);
Rotation(0.5,0.5,0.2,g_theta);
Rotation(0.1,0.1,0.01,g_theta);
glDisableVertexAttribArray(0);
SDL_GL_SwapWindow(fenetre);
}
}
SDL_GL_DeleteContext(contexteOpenGL);
SDL_DestroyWindow(fenetre);
SDL_Quit();
return 0;
}
创建椭圆的功能
void DrawCircle(float cx, float cy, float r, int num_segments)
{
glBegin(GL_LINE_LOOP);
for(int ii = 0; ii < num_segments; ii++)
{
float theta = 2.0 * M_PI * float(ii) / float(num_segments);
float x_c = r * cosf(theta);//calculate the x component
float y_c = r * sinf(theta);//calculate the y component
glColor3f(1.0f,0.0f,0.0f);
glVertex2f(x_c + cx, y_c + cy);//output vertex
}
glEnd();
}
将圆与椭圆连接的功能
void DrawEllipse(float cx, float cy, float a, float b, int num_segments)
{
glBegin(GL_LINE_LOOP);
for(int ii = 0; ii < num_segments; ii++)
{
float theta = 2.0 * M_PI * float(ii) / float(num_segments);
float x_e = a * cosf(theta);//calculate the x component
float y_e = b * sinf(theta);//calculate the y component
glColor3f(0.0f,0.0f,1.0f);
glVertex2f(x_e + cx, y_e + cy);//output vertex
}
glEnd();
}
此代码显示在椭圆上移动的圆。
我想在圆圈移动时调整窗口大小。
我已经将窗口设置为可调整大小：
void Rotation(float a,float b,float r, float g_theta )
{
float x = a * cosf(g_theta * M_PI / 180.0f);
float y = b * sinf(g_theta * M_PI / 180.0f);
float d = sqrtf( x*x + y*y );
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
glPushMatrix();
glRotatef( g_theta, 0, 0, 1 ); // rotation around the z axis
glTranslatef( d, 0, 0 ); // translation by the distance
DrawCircle(0, 0, r, 50);
glPopMatrix();
DrawEllipse(0, 0, a, b, 50);
}
但是当我运行代码时，无法调整大小。
在循环fenetre = SDL_CreateWindow("Test SDL 2.0", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 600, 600, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
运行时，如何调整窗口的大小？
答案 0 :(得分：0)
问题是，您有2个嵌套循环，而外部循环具有事件处理，而内部循环则没有。 您当前的设计是这样的：
while not end
event handling
theta = 0
while (theta < 360)
theta ++;
draw geometry
这导致内部循环中的所有窗口（如调整大小）都没有长时间处理。
您必须像这样更改设计以解决您的问题：
theta = 0
while not end
event handling
draw geometry
theta ++;
if theta > 360 then theta = 0
此外，每次窗口大小更改时，都必须使视口矩形适合窗口大小。这可以通过glViewport完成：
以某种方式更改程序的主循环：
int vp_cx = 0;
int vp_cy = 0;
float g_theta = 0.0f;
while(!terminer)
{
SDL_Event event;
while ( SDL_PollEvent( &event ) );
{
switch (event.type)
{
case SDL_QUIT: terminer = true; break;
}
}
int cx, cy;
SDL_GetWindowSize( fenetre, &cx, &cy );
if ( vp_cx != cx || vp_cy != cy )
{
vp_cx = cx; vp_cy = cy;
glViewport( 0, 0, vp_cx, vp_cy );
}
glClear(GL_COLOR_BUFFER_BIT);
glClear(GL_COLOR_BUFFER_BIT);
DrawCircle(0, 0, 0.3, 50);
Rotation(0.8,0.65,0.1,g_theta);
Rotation(0.5,0.5,0.2,g_theta);
Rotation(0.1,0.1,0.01,g_theta);
glDisableVertexAttribArray(0);
SDL_GL_SwapWindow(fenetre);
g_theta += 1.0f;
if ( g_theta >= 360.0f-0.001f )
g_theta = 0.0;
}