void cameraRotate()
{
elevationRotation.set(
1, 0, 0, 0,
0, cos(elevation * -1), (sin(elevation * -1) * -1), 0,
0, sin(elevation * -1), cos(elevation * -1), 0,
0, 0, 0, 1);
azimuthRotation.set(
cos(azimuth * -1), 0, sin(azimuth * -1), 0,
0, 1, 0, 0,
(sin(azimuth * -1) * -1), 0, cos(azimuth * -1), 0,
0, 0, 0, 1);
elevationRotation.setState(gmtl::Matrix44f::ORTHOGONAL);
azimuthRotation.setState(gmtl::Matrix44f::ORTHOGONAL);
gmtl::transpose(elevationRotation);
gmtl::transpose(azimuthRotation);
view = viewScale * elevationRotation * azimuthRotation;
view.setState(gmtl::Matrix44f::FULL);
glutPostRedisplay();
}
void SetProjection(float width, float depth, gmtl::Matrix44f &p)
{
p.set(2.0f / width, 0.0f, 0.0f, 0.0f,
0.0f, 2.0f / width, 0.0f, 0.0f,
0.0f, 0.0f, 2.0f / depth, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
}
void cameraRotate()
{
elevationRotation.set(
1, 0, 0, 0,
0, cos(elevation * -1), (sin(elevation * -1) * -1), 0,
0, sin(elevation * -1), cos(elevation * -1), 0,
0, 0, 0, 1);
azimuthRotation.set(
cos(azimuth * -1), 0, sin(azimuth * -1), 0,
0, 1, 0, 0,
(sin(azimuth * -1) * -1), 0, cos(azimuth * -1), 0,
0, 0, 0, 1);
elevationRotation.setState(gmtl::Matrix44f::ORTHOGONAL);
azimuthRotation.setState(gmtl::Matrix44f::ORTHOGONAL);
if (c_tableCenter)
{
cameraTrans = gmtl::makeTrans<gmtl::Matrix44f>(gmtl::Vec3f(0, 0, 0));
}
else if (c_cueFollow)
{
cameraTrans = gmtl::makeTrans<gmtl::Matrix44f>(sceneGraph[0]->GetPosition());
}
viewRotation = azimuthRotation * elevationRotation;
gmtl::invert(viewRotation);
originalView = cameraTrans * azimuthRotation * elevationRotation * cameraZ;
view = gmtl::invert(originalView);
glutPostRedisplay();
}
void init()
{
elevation = azimuth = 0;
ballRadius = 4.0f;
ballDiameter = ballRadius * 2.0f;
hit = c_tableCenter = c_cueFollow = c_cue = bounce = attract = false;
hitScale = 3.0f;
drag = 0.1f;
restitutionBall = 0.0f;
restitutionWall = 1.0f;
simStep = 1;
delta = 1.0f;
// Enable depth test (visible surface determination)
glEnable(GL_DEPTH_TEST);
// OpenGL background color
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
// Load/compile/link shaders and set to use for rendering
ShaderInfo shaders[] = { { GL_VERTEX_SHADER, "Cube_Vertex_Shader.vert" },
{ GL_FRAGMENT_SHADER, "Cube_Fragment_Shader.frag" },
{ GL_NONE, NULL } };
program = LoadShaders(shaders);
glUseProgram(program);
//Get the shader parameter locations for passing data to shaders
NormalMatrix = glGetUniformLocation(program, "NormalMatrix");
lightPosition_loc = glGetUniformLocation(program, "lightPosition");
ambientLight_loc = glGetUniformLocation(program, "ambientLight");
diffuseLight_loc = glGetUniformLocation(program, "diffuseLight");
specularLight_loc = glGetUniformLocation(program, "specularLight");
glActiveTexture(GL_TEXTURE0);
texture_location = glGetUniformLocation(program, "texture_Colors");
glBindTexture(GL_TEXTURE_2D, texture_location);
gmtl::identity(view);
gmtl::identity(viewRotation);
gmtl::identity(cameraTrans);
lightPosition.set(0.0f, 20.0f, 0.0f);
nearValue = 1.0f;
farValue = 1000.0f;
topValue = screenHeight / screenWidth;
bottomValue = topValue * -1.0f;
rightValue = 1.0f;
leftValue = -1.0f;
projection.set(
((2.0f * nearValue) / (rightValue - leftValue)), 0.0f, ((rightValue + leftValue) / (rightValue - leftValue)), 0.0f,
0.0f, ((2.0f * nearValue) / (topValue - bottomValue)), ((topValue + bottomValue) / (topValue - bottomValue)), 0.0f,
0.0f, 0.0f, ((-1.0f * (farValue + nearValue)) / (farValue - nearValue)), ((-2.0f*farValue*nearValue)/(farValue-nearValue)),
0.0f,0.0f,-1.0f,0.0f
);
cameraZFactor = 350.0f;
cameraZ = gmtl::makeTrans<gmtl::Matrix44f>(gmtl::Vec3f(0.0f,0.0f,cameraZFactor));
cameraZ.setState(gmtl::Matrix44f::TRANS);
elevation = degreesToRadians(30.0f);
azimuth = 0.0f;
cameraRotate();
buildGraph();
}
void keyboard(unsigned char key, int x, int y)
{
switch (key)
{
case '1':
hitScale = 1.0f;
break;
case '2':
hitScale = 2.0f;
break;
case '3':
hitScale = 3.0f;
break;
case '4':
hitScale = 4.0f;
break;
case '5':
hitScale = 5.0f;
break;
case '6':
hitScale = 6.0f;
break;
case '7':
hitScale = 7.0f;
break;
case '8':
hitScale = 8.0f;
break;
case '9':
hitScale = 9.0f;
break;
case 'f':
c_cueFollow = true;
c_cue = c_tableCenter = false;
break;
case 'k':
drag += 0.01f;
break;
case 'K':
drag = max(0.0f,drag - 0.01f);
break;
case 'm':
sceneGraph[0]->mass += 1.0f;
break;
case 'M':
sceneGraph[0]->mass = max(0.0f, sceneGraph[0]->mass - 1.0f);
break;
case 'j':
restitutionBall = min(restitutionBall + 0.01f,1.0f);
break;
case 'J':
restitutionBall = max(0.0f, restitutionBall - 0.01f);
break;
case 'n':
restitutionWall = min(restitutionWall + 0.01f, 1.0f);
break;
case 'N':
restitutionWall = max(0.0f, restitutionWall - 0.01f);
break;
case 'h':
delta += max(1.0f, delta + 0.01f);
break;
case 'H':
delta = max(delta - 0.01f, 0.0f);
break;
case 'b':
bounce = (bounce ? false:true);
break;
case 'a':
attract = (attract ? false : true);
break;
case 'Z':
cameraZFactor += 10.f;
cameraZ = gmtl::makeTrans<gmtl::Matrix44f>(gmtl::Vec3f(0.0f, 0.0f, cameraZFactor));
cameraZ.setState(gmtl::Matrix44f::TRANS);
view = cameraTrans * azimuthRotation * elevationRotation * cameraZ;
gmtl::invert(view);
break;
case 'z':
cameraZFactor -= 10.f;
cameraZ = gmtl::makeTrans<gmtl::Matrix44f>(gmtl::Vec3f(0.0f, 0.0f, cameraZFactor));
cameraZ.setState(gmtl::Matrix44f::TRANS);
view = cameraTrans * azimuthRotation * elevationRotation * cameraZ;
gmtl::invert(view);
break;
case 033 /* Escape key */:
exit(EXIT_SUCCESS);
break;
}
glutPostRedisplay();
}