Mercurial > 3de

changeset 1:88acf3d645e3 draw_triangle

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Draws a triangle from sample.scn!
author jsipek@huey.fsl.cs.sunysb.edu
date Thu, 24 Nov 2005 00:10:41 -0400
parents 443290507ab9
children f51d90d60df2
files render.c sample.scn
diffstat 2 files changed, 69 insertions(+), 26 deletions(-) [+]
line wrap: on
line diff
--- a/render.c	Wed Nov 23 23:16:20 2005 -0400
+++ b/render.c	Thu Nov 24 00:10:41 2005 -0400
@@ -14,10 +14,35 @@
 
 #define BUF_SIZE 1024
 
-int fd;
-//FILE* f;
+int infd;
+int outfd;
 char *buf, *ptr;
 
+void display(void);
+
+int valid_digit_char(char c)
+{
+	if (((c >= '0') && (c <= '9')) || (c == '-') || (c == '+') || (c == '.'))
+		return 1;
+	return 0;
+}
+
+char* update_ptr(char* buf)
+{
+	int i;
+	int on_num;
+
+	for(i=0, on_num=0; i<3; buf++) {
+		if (!valid_digit_char(*buf) && on_num) {
+			on_num = 0;
+			i++;
+		} else if (valid_digit_char(*buf) && !on_num)
+			on_num = 1;
+	}
+
+	return buf;
+}
+
 void draw_poly(char* buf)
 {
 	float f1, f2, f3;
@@ -30,15 +55,30 @@
 			break;
 		printf("using color: %f %f %f\n", f1, f2, f3);
 		glColor3f(f1, f2, f3);
+		buf = update_ptr(buf);
 
 		if (sscanf(buf, "%f %f %f", &f1, &f2, &f3) != 3)
 			break;
 		printf("using vertex: %f %f %f\n", f1, f2, f3);
 		glVertex3f(f1, f2, f3);
+		buf = update_ptr(buf);
 	}
 	glEnd();
 }
 
+void key(unsigned char c, int x, int y)
+{
+	char b[16];
+
+	printf("key pressed: %c, mouse at (%d,%d)\n", c, x, y);
+
+	memset(b, 0, 16);
+	snprintf(b, 16, "%c %d %d\n", c, x, y);
+	write(outfd, b, 16);
+
+	display();
+}
+
 void display(void)
 {
 	ssize_t r;
@@ -47,7 +87,7 @@
 		if ((ptr) >= (buf + BUF_SIZE))
 			break;
 
-		r = read(fd, ptr, 1);
+		r = read(infd, ptr, 1);
 
 		if ((r == -1) || (r == 0) || (*ptr == '\n')) {
 			*ptr = '\0';
@@ -60,24 +100,24 @@
 	printf("buf = \"%s\"\n", buf);
 	fflush(stdout);
 		
-	/*	if (!strncmp(buf, "CLEAR", 5)) {
+		if (!strncmp(buf, "CLEAR", 5)) {
 			printf("clearing..\n");
-			fflush(stdout);*/
+			fflush(stdout);
 			glClear(GL_COLOR_BUFFER_BIT);
-/*		} else if (!strncmp(buf, "FLUSH", 5)) {
-			printf("flushing..\n"); */
-	glBegin(GL_POLYGON);
+		} else if (!strncmp(buf, "FLUSH", 5)) {
+			printf("flushing..\n"); 
+	/*glBegin(GL_POLYGON);
 		glVertex3f(-0.5, -0.5, 0.5);
 		glVertex3f(-0.5, 0.5, 0.5);
 		glVertex3f(0.5, 0.5, 0.5);
-	glEnd();
+	glEnd();*/
 			glFlush();
-/*		} else if (!strncmp(buf, "POLY", 4))
-			draw_poly(buf);*/
-	/*	else {
+		} else if (!strncmp(buf, "POLY", 4))
+			draw_poly(buf);
+		else {
 			printf("unknown command\n");
 			fflush(stdout);
-		}*/
+		}
 
 	ptr = buf;
 
@@ -90,8 +130,6 @@
 	glVertex2f(0.5, 0.5);
 	glVertex2f(0.5, -0.5);
 	glEnd();*/
-
-	/* flush GL buffers */
 }
 
 
@@ -120,24 +158,27 @@
 
 int main(int argc, char** argv)
 {
-	unlink("/tmp/3de.pipe");
+#define PIPE_IN		"/tmp/3de.in"
+#define PIPE_OUT	"/tmp/3de.out"
 
-	if ((buf = (char*) malloc(sizeof(char)*BUF_SIZE)) == NULL) {
+	unlink(PIPE_IN);
+	unlink(PIPE_OUT);
+
+	if ((buf = (char*) malloc(sizeof(char)*BUF_SIZE)) == NULL)
 		die();
-	}
 	ptr = buf;
 
-	if (mkfifo("/tmp/3de.pipe", 0777) == -1) {
+	if (mkfifo(PIPE_IN, 0777) == -1)
 		die();
-	}
 
-	if ((fd = open("/tmp/3de.pipe", O_RDONLY | O_NONBLOCK | O_NDELAY)) == -1) { 
+	if (mkfifo(PIPE_OUT, 0777) == -1)
 		die();
-	}
 
-	/*if (!(f = fdopen(fd, "r"))) {
+	if ((infd = open(PIPE_IN, O_RDWR | O_NONBLOCK | O_NDELAY)) == -1)
 		die();
-	}*/
+
+	if ((outfd = open(PIPE_OUT, O_RDWR | O_NONBLOCK | O_NDELAY)) == -1)
+		die();
 
 	glutInit(&argc,argv);
 	glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
@@ -145,10 +186,12 @@
 	glutInitWindowPosition(0,0);
 	glutCreateWindow("3D Engine");
 	glutDisplayFunc(display);
+	glutKeyboardFunc(key);
 	init();
 	glutMainLoop();
 
-	close(fd);
+	close(infd);
+	close(outfd);
 
 	return 0;
 }
--- a/sample.scn	Wed Nov 23 23:16:20 2005 -0400
+++ b/sample.scn	Thu Nov 24 00:10:41 2005 -0400
@@ -1,3 +1,3 @@
 CLEAR
-POLY 1 0 0 -0.5 -0.5 0 0 1 0 -0.5 0.5 0 0 0 1 0.5 0.5 0
+POLY 1 0 0 -0.5 -0.5 0.5 0 1 0 -0.5 0.5 0.5 0 0 1 0.5 0.5 0.5
 FLUSH