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Copy pathDrawerOpenGL.cpp
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103 lines (88 loc) · 2.59 KB
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#include "hacklib/DrawerOpenGL.h"
#include <GL/gl.h>
#include <cmath>
#include <numbers>
using namespace hl;
void DrawerOpenGL::drawLine(float x1, float y1, float x2, float y2, hl::Color color) const
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, m_width, m_height, 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glLineWidth(1.0);
color.glSet();
glBegin(GL_LINES);
glVertex2f(x1, y1);
glVertex2f(x2, y2);
glEnd();
}
void DrawerOpenGL::drawRect(float x, float y, float w, float h, hl::Color color) const
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, m_width, m_height, 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glBegin(GL_LINE_LOOP);
color.glSet();
glVertex2f(x, y);
glVertex2f(x, y + h);
glVertex2f(x + w, y + h);
glVertex2f(x + w, y);
glEnd();
}
void DrawerOpenGL::drawRectFilled(float x, float y, float w, float h, hl::Color color) const
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, m_width, m_height, 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glBegin(GL_QUADS);
color.glSet();
glVertex2f(x, y);
glVertex2f(x, y + h);
glVertex2f(x + w, y + h);
glVertex2f(x + w, y);
glEnd();
}
void DrawerOpenGL::drawCircle(float mx, float my, float r, hl::Color color) const
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, m_width, m_height, 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glBegin(GL_LINE_LOOP);
color.glSet();
for (int i = 0; i < CIRCLE_RESOLUTION; i++)
{
glVertex2f(mx + r * std::cos(std::numbers::pi_v<float> * (i / (CIRCLE_RESOLUTION / 2.0f))),
my + r * std::sin(std::numbers::pi_v<float> * (i / (CIRCLE_RESOLUTION / 2.0f))));
}
glEnd();
}
void DrawerOpenGL::drawCircleFilled(float mx, float my, float r, hl::Color color) const
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, m_width, m_height, 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glBegin(GL_TRIANGLE_FAN);
color.glSet();
for (int i = 0; i < CIRCLE_RESOLUTION + 1; i++)
{
glVertex2f(mx + r * std::cos(std::numbers::pi_v<float> * (i / (CIRCLE_RESOLUTION / 2.0f))),
my + r * std::sin(std::numbers::pi_v<float> * (i / (CIRCLE_RESOLUTION / 2.0f))));
}
glEnd();
}
void DrawerOpenGL::updateDimensions()
{
GLint viewport[4];
glGetIntegerv(GL_VIEWPORT, viewport);
m_width = static_cast<float>(viewport[2]);
m_height = static_cast<float>(viewport[3]);
}