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shooting bullets

Started by phil67rpg Nov 6, 2019 at 5:23 PM 5 replies 3.6k views

Original Post

Nov 6, 2019 at 5:23 PM

I have almost solved my next problem. I got my bullet to rotate with the ship but it only moves straight up when it is fired. my question is how do I get it to move following the nose of the ship.


void drawBullet()
{
	glPushMatrix();
	glColor3f(1.0f, 0.0f, 0.0f);
	glLoadIdentity();
	glTranslatef(50.0f, 0.0f, 0.0f);
	glTranslatef(dx, dy, 0.0f);
	glPointSize(2.0f);
	glBegin(GL_POINTS);
	float offsets[1][2] = { {0.0f, 10.0f} };
	float cosA = cos(shipAngle);
	float sinA = sin(shipAngle);
	for (int i = 0; i < 1; i++)
		glVertex3f(offsets[i][0] * cosA - offsets[i][1] * sinA, offsets[i][0] * sinA + offsets[i][1] * cosA + up, 0.0f);
	glEnd();
	glPopMatrix();
}

Lactose

Nov 6, 2019 at 6:49 PM

You claimed to solve this almost a year ago.

fleabay

Nov 6, 2019 at 7:20 PM

33 minutes ago, Lactose said:

You claimed to solve this almost a year ago.

You clearly don't understand the concept of a running gag.

phil67rpg

Nov 7, 2019 at 12:44 AM

well I have solved this problem as well, here is my code


void drawBullet()
{
	glPushMatrix();
	glColor3f(1.0f, 0.0f, 0.0f);
	glLoadIdentity();
	glTranslatef(50.0f, 0.0f, 0.0f);
	glTranslatef(dx, dy, 0.0f);
	glPointSize(2.0f);
	glBegin(GL_POINTS);
	float offsets[1][2] = { {0.0f, 10.0f} };
	float cosA = cos(shipAngle);
	float sinA = sin(shipAngle);
	for (int i = 0; i < 1; i++)
		glVertex3f(offsets[i][0] * cosA - offsets[i][1] * sinA*up, offsets[i][0] * sinA + offsets[i][1] * cosA*up, 0.0f);
	glEnd();
	glPopMatrix();
}

you can also close this thread.

phil67rpg

Nov 8, 2019 at 11:56 PM

you can close this thread

Tom Sloper

Nov 9, 2019 at 12:40 AM

You can stop asking to have threads closed.

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