public static void setCelestialPosition() {
// This is called when the current matrix is the modelview matrix based on the celestial angle.
// The sun is at (0, 100, 0), and the moon is at (0, -100, 0).
FloatBuffer modelView = BufferUtils.createFloatBuffer(16);
glGetFloat(GL_MODELVIEW_MATRIX, modelView);
float[] mv = new float[16];
modelView.get(mv, 0, 16);
float[] sunPos = multiplyMat4xVec4(mv, new float[] {0.0F, 100.0F, 0.0F, 0.0F});
sunPosition = sunPos;
float[] moonPos = multiplyMat4xVec4(mv, new float[] {0.0F, -100.0F, 0.0F, 0.0F});
moonPosition = moonPos;
}
public static void setCamera(float f) {
EntityLiving viewEntity = mc.renderViewEntity;
double x = viewEntity.lastTickPosX + (viewEntity.posX - viewEntity.lastTickPosX) * f;
double y = viewEntity.lastTickPosY + (viewEntity.posY - viewEntity.lastTickPosY) * f;
double z = viewEntity.lastTickPosZ + (viewEntity.posZ - viewEntity.lastTickPosZ) * f;
if (isShadowPass) {
glViewport(0, 0, shadowMapWidth, shadowMapHeight);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (shadowMapIsOrtho) {
glOrtho(
-shadowMapHalfPlane,
shadowMapHalfPlane,
-shadowMapHalfPlane,
shadowMapHalfPlane,
0.05f,
256.0f);
} else {
// just backwards compatibility. it's only used when SHADOWFOV is set in the shaders.
gluPerspective(
shadowMapFOV, (float) shadowMapWidth / (float) shadowMapHeight, 0.05f, 256.0f);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0f, 0.0f, -100.0f);
glRotatef(90.0f, 1.0f, 0.0f, 0.0f);
float angle = -mc.theWorld.getCelestialAngle(f) * 360.0f;
if (angle < -90.0 && angle > -270.0) {
// night time
glRotatef(angle + 180.0f, 0.0f, 0.0f, 1.0f);
} else {
// day time
glRotatef(angle, 0.0f, 0.0f, 1.0f);
}
if (shadowMapIsOrtho) {
// reduces jitter
glTranslatef((float) x % 5.0f, (float) y % 5.0f, (float) z % 5.0f);
}
shadowProjection = BufferUtils.createFloatBuffer(16);
glGetFloat(GL_PROJECTION_MATRIX, shadowProjection);
shadowProjectionInverse = invertMat4x(shadowProjection);
shadowModelView = BufferUtils.createFloatBuffer(16);
glGetFloat(GL_MODELVIEW_MATRIX, shadowModelView);
shadowModelViewInverse = invertMat4x(shadowModelView);
return;
}
previousProjection = projection;
projection = BufferUtils.createFloatBuffer(16);
glGetFloat(GL_PROJECTION_MATRIX, projection);
projectionInverse = invertMat4x(projection);
previousModelView = modelView;
modelView = BufferUtils.createFloatBuffer(16);
glGetFloat(GL_MODELVIEW_MATRIX, modelView);
modelViewInverse = invertMat4x(modelView);
previousCameraPosition[0] = cameraPosition[0];
previousCameraPosition[1] = cameraPosition[1];
previousCameraPosition[2] = cameraPosition[2];
cameraPosition[0] = x;
cameraPosition[1] = y;
cameraPosition[2] = z;
}