Grafika Komputer: Segitiga degradasi

dibawah ini adalah code program untuk objek segitiga degradasi, tugas pertama saya dalam mata kuliah grafika komputer yang menggunakan OpenGL lib.

#include<glut.h>

#include<stdlib.h>

#include<stdio.h>

typedef struct{

float x,y;

}point2D_t;

typedef struct{

float x,y,z;

}color_t;

void setColor(color_t color)

{

glColor3f(color.x,color.y,color.z);

}

void fillPolygonGradate(point2D_t a[],int n,color_t color[])

{

int i;

glBegin(GL_POLYGON);

for(i=0;i<n;i++)

{

int w=i/2;

setColor(color[w]);

glVertex2f(a[i].x,a[i].y);

}

glEnd();

}

void userdraw(void)

{

point2D_t persegi1[4]={{200,110},{100,110},{100,210},{200,210}};

color_t warna1[4]={{1.0,1.0,0.1},{1.0,0.0,1.0}};

point2D_t segitiga1[3]={{210,220},{310,220},{260,300}};

color_t warna2[3]={{0.0,0.0,1.0},{1.0,0.0,1.0}};

point2D_t segitiga2[3]={{100,100},{200,100},{150,10}};

color_t warna4[4]={{1.0,0.0,0.0},{0.0,1.0,0.1}};

point2D_t persegi2[4]={{310,110},{210,110},{210,210},{310,210}};

color_t warna3[3]={{1.0,0.0,0.0},{0.0,0.0,1.1}};

fillPolygonGradate(persegi1,4,warna1);

fillPolygonGradate(segitiga1,3,warna2);

fillPolygonGradate(segitiga2,3,warna3);

fillPolygonGradate(persegi2,4,warna4);

}

void display (void) 

{

glClear(GL_COLOR_BUFFER_BIT);

userdraw();

glFlush();

}

void main(int argc, char **argv)

{

glutInit(&argc, argv);

glutInitDisplayMode(GLUT_SINGLE |GLUT_RGB);

glutInitWindowPosition(100,150);

glutInitWindowSize(640,480);

glutCreateWindow("Gradasi warna");

glClearColor(0.0,0.0,0.0,1.0);

gluOrtho2D(0.,640.,0.0,480.0);

glutDisplayFunc(display);

glutMainLoop();

}