From 8cf216ee1cc6d68d2570bfb4e2d92405d469bbb1 Mon Sep 17 00:00:00 2001
From: Eleni Maria Stea <estea@igalia.com>
Date: Sat, 18 Apr 2020 20:05:18 +0300
Subject: [PATCH] initial commit: a line and 5 points

---
 Makefile        |   24 +++++++++++++++++++
 src/main.cc     |   72 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/tentacle.cc |   48 +++++++++++++++++++++++++++++++++++++
 src/tentacle.h  |   20 ++++++++++++++++
 4 files changed, 164 insertions(+)
 create mode 100755 Makefile
 create mode 100644 src/main.cc
 create mode 100644 src/tentacle.cc
 create mode 100644 src/tentacle.h

diff --git a/Makefile b/Makefile
new file mode 100755
index 0000000..f2fc953
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,24 @@
+src = $(wildcard src/*.cc)
+obj = $(src:.cc=.o)
+dep = $(obj:.o=.d)
+bin = splines 
+
+dbg = -g
+opt = -O0
+inc = -Isrc
+
+CXX = g++
+CXXFLAGS = -pedantic -Wall $(dbg) $(opt) $(inc)
+LDFLAGS = -lGL -lGLU -lglut -lGLEW -limago -lgmath
+
+$(bin): $(obj)
+	$(CXX) -o $@ $(obj) $(LDFLAGS)
+
+-include $(dep)
+
+%.d: %.cc
+	@$(CPP) $(CXXFLAGS) $< -MM -MT $(@:.d=.o) >$@
+
+.PHONY: clean
+clean:
+	rm -f $(obj) $(bin) $(dep)
diff --git a/src/main.cc b/src/main.cc
new file mode 100644
index 0000000..c5ebc84
--- /dev/null
+++ b/src/main.cc
@@ -0,0 +1,72 @@
+#include <GL/glew.h>
+#include <GL/glut.h>
+#include <stdio.h>
+
+#include "tentacle.h"
+
+static bool init();
+static void cleanup();
+
+static void display();
+static void keyboard(unsigned char key, int x, int y);
+
+/* XXX FIXME */
+static Tentacle tentacle;
+
+int main(int argc, char **argv)
+{
+	glutInit(&argc, argv);
+	glutInitWindowSize(800, 600);
+	glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
+
+	glutCreateWindow("ludu mice");
+	glutDisplayFunc(display);
+	glutKeyboardFunc(keyboard);
+
+	if (!init())
+		exit(1);
+
+	atexit(cleanup);
+
+	glutMainLoop();
+}
+
+static bool init()
+{
+	glewInit();
+	glClearColor(1.0, 1.0, 0.0, 1.0);
+
+	if (!tentacle.init()) {
+		fprintf(stderr, "Failed to initialize tentacle control points.\n");
+		return false;
+	}
+
+	return true;
+}
+
+static void cleanup()
+{
+}
+
+static void display()
+{
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+	//XXX FIXME
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+
+	tentacle.draw();
+
+	glutSwapBuffers();
+}
+
+static void keyboard(unsigned char key, int x, int y)
+{
+	switch(key) {
+	case 27:
+		exit(0);
+	default:
+		break;
+	}
+}
diff --git a/src/tentacle.cc b/src/tentacle.cc
new file mode 100644
index 0000000..7a69c29
--- /dev/null
+++ b/src/tentacle.cc
@@ -0,0 +1,48 @@
+#include <GL/gl.h>
+#include "tentacle.h"
+
+Tentacle::Tentacle()
+{
+}
+
+Tentacle::~Tentacle()
+{
+}
+
+bool
+Tentacle::init()
+{
+	for (int i=0; i<5; i++) {
+		add_control_point(Vec3(0.5, i / 10.0, 0.0));
+	}
+	return true;
+}
+
+void
+Tentacle::add_control_point(const Vec3 &point)
+{
+	cpoints.push_back(point);
+}
+
+void
+Tentacle::draw()
+{
+	glLineWidth(2.0);
+	glBegin(GL_LINE_STRIP);
+	glColor3f(0.0, 0.0, 1.0);
+	for(size_t i=0; i<cpoints.size(); i++) {
+		glVertex3f(cpoints[i].x, cpoints[i].y, cpoints[i].z);
+	}
+	glEnd();
+
+	// XXX DEBUG
+	glDisable(GL_DEPTH_TEST);
+	glPointSize(5.0);
+	glBegin(GL_POINTS);
+	glColor3f(1.0, 0.0, 0.0);
+	for(size_t i=0; i<cpoints.size(); i++) {
+		glVertex3f(cpoints[i].x, cpoints[i].y, 1.0);
+	}
+	glEnd();
+	glEnable(GL_DEPTH_TEST);
+}
diff --git a/src/tentacle.h b/src/tentacle.h
new file mode 100644
index 0000000..cb07a35
--- /dev/null
+++ b/src/tentacle.h
@@ -0,0 +1,20 @@
+#ifndef TENTACLE_H_
+#define TENTACLE_H_
+
+#include <vector>
+#include <gmath/gmath.h>
+
+class Tentacle {
+private:
+	std::vector<Vec3> cpoints;
+
+public:
+	Tentacle();
+	~Tentacle();
+
+	bool init();
+	void add_control_point(const Vec3 &point);
+	void draw();
+};
+
+#endif // TENTACLE_H_
-- 
1.7.10.4