hasufell/half-edge
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Implement rotation of the single object

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hasufell 2014-05-09 14:27:58 +02:00
parent 03fca66adc
commit ab95762d50
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GPG Key ID: 220CD1C5BDEED020
3 changed files with 57 additions and 68 deletions
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110
gl_draw.c
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@ -16,6 +16,8 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "err.h"
#include "filereader.h"
#include "types.h"
#include <GL/glut.h>
@ -28,7 +30,6 @@
#include <stdio.h>
#define filename __FILE__
#define XY_WIRE_COUNT 10.0f
#define ROT_FACTOR_PLANET_SUN (360.0 / yearabs)
@ -47,18 +48,37 @@ HE_obj *obj;
/*
* static function declaration
*/
static void draw_Sun(void);
static void draw_obj(uint32_t xrot, uint32_t yrot, uint32_t zrot);
static void draw_Planet_1(void);
static void draw_Planet_2(void);
/**
* Draws a sun which changes its color randomly.
* Draws an object.
*
* @param myxrot rotation increment around x-axis
* @param myyrot rotation increment around x-axis
* @param myzrot rotation increment around x-axis
*/
static void draw_Sun(void)
static void draw_obj(uint32_t myxrot, uint32_t myyrot, uint32_t myzrot)
{
static uint32_t xrot = 0,
yrot = 0,
zrot = 0;
xrot += myxrot;
yrot += myyrot;
zrot += myzrot;
glPushMatrix();
/* rotate according to static members */
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z);
glRotatef(xrot, 1.0f, 0.0f, 0.0f);
glRotatef(yrot, 0.0f, 1.0f, 0.0f);
glRotatef(zrot, 0.0f, 0.0f, 1.0f);
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z_BACK);
/* pull into middle of universe */
glTranslatef(-obj->faces->edge->vert->x,
-obj->faces->edge->vert->y,
@ -74,7 +94,6 @@ static void draw_Sun(void)
glVertex3f(tmp_edge->vert->x,
tmp_edge->vert->y,
tmp_edge->vert->z);
} while ((tmp_edge = tmp_edge->next) != obj->faces[i].edge);
}
@ -96,7 +115,7 @@ static void draw_Planet_1(void)
glPushMatrix();
//Rotate around the sun
/* Rotate around the sun */
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z);
glRotatef(90, 1.0f, 0.0f, 0.0f);
glRotatef((ROT_FACTOR_PLANET_SUN * day), 0.0f, 0.0f, 1.0f);
@ -106,12 +125,13 @@ static void draw_Planet_1(void)
glColor3f(1.0f, 0.0f, 0.0f);
//A rotation (full 360°) once a day is much too fast you woulden'd see a thing
/* A rotation (full 360°) once a day is much
* too fast you woulden'd see a thing */
glRotatef((ROT_FACTOR_PLANET * day) / rot_fac_day, 0.0f, 0.0f, 1.0f);
glutWireSphere(1.0f, XY_WIRE_COUNT, XY_WIRE_COUNT);
glRotatef((ROT_FACTOR_PLANET * day) / rot_fac_day, 0.0f, 0.0f, -1.0f);
//Center axis
/* Center axis */
glPushMatrix();
glLineWidth(3);
glColor3f(1.0, 1.0, 1.0);
@ -121,33 +141,33 @@ static void draw_Planet_1(void)
glEnd();
glPopMatrix();
//circle1
/* circle1 */
glPushMatrix();
glColor3f(0.8f, 0.0f, 0.2f);
//glRotatef(90, 0.0f, 1.0f, 0.0f); //"senkrecht zur Planetenachse"
/* glRotatef(90, 0.0f, 1.0f, 0.0f); [> "senkrecht zur Planetenachse" <] */
gluDisk(quadric, 1.2f, 1.3f, 32, 1);
glPopMatrix();
//circle2
/* circle2 */
glPushMatrix();
glColor3f(0.0f, 1.0f, 0.0f);
//glRotatef(90, 0.0f, 1.0f, 0.0f); //"senkrecht zur Planetenachse"
/* glRotatef(90, 0.0f, 1.0f, 0.0f); [> "senkrecht zur Planetenachse" <] */
gluDisk(quadric, 1.4f, 1.7f, 32, 1);
glPopMatrix();
//Moon1
/* Moon1 */
glPushMatrix();
glColor3f(0.0f, 0.0f, 1.0f);
//glRotatef((ROT_FACTOR_MOON * day), 1.0f, 0.0f, 0.0f); //"senkrecht zur Planetenachse"
/* glRotatef((ROT_FACTOR_MOON * day), 1.0f, 0.0f, 0.0f); [> "senkrecht zur Planetenachse" <] */
glRotatef((ROT_FACTOR_MOON * day), 0.0f, 0.0f, 1.0f);
glTranslatef(0.0f, 2.0f, 0.0f);
glutWireSphere(0.1f, XY_WIRE_COUNT, XY_WIRE_COUNT);
glPopMatrix();
//Moon2
/* Moon2 */
glPushMatrix();
glColor3f(0.0f, 1.0f, 1.0f);
//glRotatef((ROT_FACTOR_MOON * day), 1.0f, 0.0f, 0.0f); //"senkrecht zur Planetenachse"
/* glRotatef((ROT_FACTOR_MOON * day), 1.0f, 0.0f, 0.0f); [> "senkrecht zur Planetenachse" <] */
glRotatef((ROT_FACTOR_MOON * day), 0.0f, 0.0f, 1.0f);
glTranslatef(0.0f, -2.0f, 0.0f);
glutWireSphere(0.1f, XY_WIRE_COUNT, XY_WIRE_COUNT);
@ -167,7 +187,7 @@ static void draw_Planet_2(void)
glPushMatrix();
const float moon_pos_fac = 2.5;
//Rotate around the sun
/* Rotate around the sun */
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z);
glRotatef(90, 1.0f, 0.0f, 0.0f);
glRotatef((ROT_FACTOR_PLANET_SUN * day), 0.0f, 0.0f, 1.0f);
@ -175,13 +195,14 @@ static void draw_Planet_2(void)
glColor3f(0.0f, 0.0f, 1.0f);
//A rotation (full 360°) once a day is much too fast you woulden'd see a thing
/* A rotation (full 360°) once a day is much
* too fast you woulden'd see a thing */
const int rot_fac_day = 15;
glRotatef((ROT_FACTOR_PLANET * day) / rot_fac_day, 0.0f, 0.0f, 1.0f);
glutWireSphere(1.3f, XY_WIRE_COUNT, XY_WIRE_COUNT);
glRotatef((ROT_FACTOR_PLANET * day) / rot_fac_day, 0.0f, 0.0f, -1.0f);
//Moon3
/* Moon3 */
glPushMatrix();
glColor3f(1.0f, 1.0f, 1.0f);
glRotatef((ROT_FACTOR_MOON * day), 0.0f, 0.0f, 1.0f);
@ -190,7 +211,7 @@ static void draw_Planet_2(void)
glutWireSphere(0.1f, XY_WIRE_COUNT, XY_WIRE_COUNT);
glPopMatrix();
//Moon4
/* Moon4 */
glPushMatrix();
glColor3f(1.0f, 0.0f, 1.0f);
glRotatef((ROT_FACTOR_MOON * day), 0.0f, 0.0f, 1.0f);
@ -199,7 +220,7 @@ static void draw_Planet_2(void)
glutWireSphere(0.1f, XY_WIRE_COUNT, XY_WIRE_COUNT);
glPopMatrix();
//Moon5
/* Moon5 */
glPushMatrix();
glColor3f(1.0f, 0.0f, 0.0f);
glRotatef((ROT_FACTOR_MOON * day), 0.0f, 0.0f, 1.0f);
@ -219,7 +240,7 @@ void display(void)
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
draw_Sun();
draw_obj(0, 0, 0);
draw_Planet_1();
draw_Planet_2();
@ -245,9 +266,11 @@ void display(void)
/**
* Sets the initial values to start the program.
*/
void init(HE_obj *myobj)
void init(char const * const filename)
{
obj = myobj;
obj = read_obj_file(filename);
if (!obj)
ABORT("Failed to read object file \"%s\"!", filename);
day = 0;
year = 0;
glClearColor(0.0, 0.0, 0.0, 0.0);
@ -303,12 +326,9 @@ void animate()
* press T to decrease the day
* press j to increase the year
* press J to decrease the year
* press x to rotate the whole scene in x direction
* press X to rotate the whole scene in -x direction
* press y to rotate the whole scene in y direction
* press Y to rotate the whole scene in -y direction
* press c to rotate the whole scene in z direction
* press C to rotate the whole scene in -z direction
* press x to rotate the middle object in x direction
* press y to rotate the middle object in y direction
* press c to rotate the middle object in z direction
* press w to translate the whole scene in y direction
* press s to translate the whole scene in -y direction
* press a to translate the whole scene in -x direction
@ -340,39 +360,15 @@ void keyboard(unsigned char key, int x, int y)
glutPostRedisplay();
break;
case 'x':
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z);
glRotatef(1, 1.0f, 0.0f, 0.0f);
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z_BACK);
draw_obj(1, 0, 0);
glutPostRedisplay();
break;
case 'y':
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z);
glRotatef(1, 0.0f, 1.0f, 0.0f);
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z_BACK);
draw_obj(0, 1, 0);
glutPostRedisplay();
break;
case 'c':
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z);
glRotatef(1, 0.0f, 0.0f, 1.0f);
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z_BACK);
glutPostRedisplay();
break;
case 'X':
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z);
glRotatef(1, -1.0f, 0.0f, 0.0f);
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z_BACK);
glutPostRedisplay();
break;
case 'Y':
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z);
glRotatef(1, 0.0f, -1.0f, 0.0f);
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z_BACK);
glutPostRedisplay();
break;
case 'C':
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z);
glRotatef(1, 0.0f, 0.0f, -1.0f);
glTranslatef(0.0f, 0.0f, SYSTEM_POS_Z_BACK);
draw_obj(0, 0, 1);
glutPostRedisplay();
break;
case 'w':

2
gl_draw.h
View File

@ -27,7 +27,7 @@
#include <GL/glu.h>
void init(HE_obj *myobj);
void init(char const * const filename);
void display(void);
void reshape(GLsizei w, GLsizei h);
void animate();

13
main.c
View File

@ -17,7 +17,6 @@
*/
#include "gl_draw.h"
#include "filereader.h"
#include "print.h"
#include "types.h"
@ -37,21 +36,15 @@ char const * const helptext = "Usage: drow-engine <file.obj>\n";
int main(int argc, char *argv[])
{
HE_obj *obj = NULL;
int windowX;
int windowY;
int screenX;
int screenY;
float factor = 0.80; // percent of screen
if (argc > 1) {
obj = read_obj_file(argv[1]);
print_vertices(obj);
print_edges(obj);
print_faces(obj);
} else {
if (argc == 1) {
printf("%s", helptext);
return 1;
}
glutInit(&argc, argv);
@ -65,7 +58,7 @@ int main(int argc, char *argv[])
glutInitWindowSize(windowX, windowY);
glutCreateWindow(filename);
init(obj);
init(argv[1]);
glutKeyboardFunc(keyboard);
glutReshapeFunc(reshape);