void TransformState::applyAccumulatedOffset() {
LayoutSize offset = m_accumulatedOffset;
m_accumulatedOffset = LayoutSize();
if (!offset.isZero()) {
if (m_accumulatedTransform) {
translateTransform(offset);
flatten();
} else {
translateMappedCoordinates(offset);
}
}
}
void TransformState::move(const LayoutSize& offset, TransformAccumulation accumulate)
{
if (accumulate == FlattenTransform || !m_accumulatedTransform)
m_accumulatedOffset += offset;
else {
applyAccumulatedOffset();
if (m_accumulatingTransform && m_accumulatedTransform) {
// If we're accumulating into an existing transform, apply the translation.
translateTransform(offset);
// Then flatten if necessary.
if (accumulate == FlattenTransform)
flatten();
} else
// Just move the point and/or quad.
translateMappedCoordinates(offset);
}
m_accumulatingTransform = accumulate == AccumulateTransform;
}
//==========Functions=============
void readFile(char *fname)
{
char filename[1024]; //holds filename
FILE *SceneFile; //points to the file
char cmd[512]; // holds a command
char Buff[2048];
int line=1; //keep track of line #s
GLdouble x, y, z, angle, ni;
char axis;
//Initialize number of lights & objects
numLights = 0;
numObjs = 0;
//Start reading scene with identity transform
loadIdentityTransform(¤tTransform[curGroupLevel]);
//Open the file
if ((SceneFile = fopen(fname, "r")) == NULL)
{
printf("Error opening scene file \n");
exit(1);
}
fscanf(SceneFile, "%s", cmd); //stores first word into cmd
//Loop to read contents of the file
while (!feof(SceneFile))
{
if (!strcmp(cmd, "view")) //compares string to view
{
fscanf(SceneFile, "%d", &view.size);
//printf("View size: %d\n", view.size);
fscanf(SceneFile, "%lf", &view.d);
//printf("View distance to corner of image plane: %f\n", view.d);
}
else if (!strncmp(cmd, "#", 1))
{
/* Comment, let's ignore! */
fgets(Buff, 2048, SceneFile); //takes in till \n is found
}
else if (!strcmp(cmd, "group"))
{
++curGroupLevel;
//printf("Current group level: %d\n", curGroupLevel);
// get transform for previous group level
currentTransform[curGroupLevel] = currentTransform[curGroupLevel-1];
}
else if (!strcmp(cmd, "groupend"))
{
--curGroupLevel;
//printf("Current group level: %d\n", curGroupLevel);
}
else if (!strcmp(cmd, "background"))
{
fscanf(SceneFile, "%lf", &backgroundColor.red);
fscanf(SceneFile, "%lf", &backgroundColor.green);
fscanf(SceneFile, "%lf", &backgroundColor.blue);
}
else if (!strcmp(cmd, "ambient"))
{
fscanf(SceneFile, "%lf", &ambient_light.red);
fscanf(SceneFile, "%lf", &ambient_light.green);
fscanf(SceneFile, "%lf", &ambient_light.blue);
}
else if (!strcmp(cmd, "light"))
{
if (numLights>=MAX_LIGHTS)
{
fprintf(stderr, "Error: max number of lights exceeded in description file\n");
fprintf(stderr, "Line %d\n", line);
exit(-1);
}
fscanf(SceneFile,"%lf", &lightSources[numLights].color.red);
fscanf(SceneFile,"%lf", &lightSources[numLights].color.green);
fscanf(SceneFile,"%lf", &lightSources[numLights].color.blue);
fscanf(SceneFile,"%lf", &lightSources[numLights].position.x);
fscanf(SceneFile,"%lf", &lightSources[numLights].position.y);
fscanf(SceneFile,"%lf", &lightSources[numLights].position.z);
//printf("Color red: %lf\n", lightSources[numLights].color.red);
//printf("Color green: %lf\n", lightSources[numLights].color.green);
//printf("Color blue: %lf\n", lightSources[numLights].color.blue);
//printf("Position x: %lf\n", lightSources[numLights].position.x);
//printf("Position y: %lf\n", lightSources[numLights].position.y);
//printf("Position z: %lf\n", lightSources[numLights].position.z);
numLights++;
}
else if (!strcmp(cmd, "sphere"))
{
objects[numObjs].transform = currentTransform[curGroupLevel];
objects[numObjs].material = currentMaterial;
numObjs++;
if (numObjs>MAX_OBJECTS)
{
fprintf(stderr, "Error: max number of objects exceeded in description file\n");
fprintf(stderr, "Line %d\n", line);
exit(-1);
}
}
else if (!strcmp(cmd, "material"))
{
fscanf(SceneFile, "%lf", ¤tMaterial.diffuse.red);
fscanf(SceneFile, "%lf", ¤tMaterial.diffuse.green);
fscanf(SceneFile, "%lf", ¤tMaterial.diffuse.blue);
fscanf(SceneFile, "%lf", ¤tMaterial.specular.red);
fscanf(SceneFile, "%lf", ¤tMaterial.specular.green);
fscanf(SceneFile, "%lf", ¤tMaterial.specular.blue);
fscanf(SceneFile, "%lf", ¤tMaterial.shininess);
// What do I do with this?
// you need to put this into the object
}
else if (!strcmp(cmd, "refraction"))
{
//needs to be setup later
}
else if (!strcmp(cmd, "move"))
{
fscanf(SceneFile, "%lf", &x);
fscanf(SceneFile, "%lf", &y);
fscanf(SceneFile, "%lf", &z);
//save current matrix off to the side
tempSave = currentTransform[curGroupLevel];
//set current matrix to identity (loadIdentityTransoform b/c
// we can't send in our current matrix)
loadIdentityTransform(¤tTransform[curGroupLevel]);
//apply passed in move to identity. so that it's first (reversing
//order)
applyTransform(translateTransform(x,y,z),¤tTransform[curGroupLevel]);
//now put save matrix on to transform passed in. (reversing order)
applyTransform( tempSave, ¤tTransform[curGroupLevel]);
}
else if (!strcmp(cmd, "scale"))
{
//printf("Scale\n");
fscanf(SceneFile, "%lf", &x);
fscanf(SceneFile, "%lf", &y);
fscanf(SceneFile, "%lf", &z);
//save current matrix off to the side
tempSave = currentTransform [curGroupLevel];
//set current matrix to identity (loadIdentTransform b/c we can't send in
//our current matrix)
loadIdentityTransform(¤tTransform[curGroupLevel]);
//apply passed in scale to identity. so that it's first (reversing
//order)
applyTransform( scaleTransform(x, y, z), ¤tTransform[curGroupLevel]);
//now put save matrix on to transform passed in. (reversing order)
applyTransform( tempSave, ¤tTransform[curGroupLevel]);
}
else if (!strcmp(cmd, "rotate"))
{
fscanf(SceneFile, "%lf", &angle);
fscanf(SceneFile, "%lf", &x);
fscanf(SceneFile, "%lf", &y);
fscanf(SceneFile, "%lf", &z);
//save current matrix off to the side
tempSave = currentTransform[curGroupLevel];
//set current matrix to identity (loadIdentTransform b/c we can't send in
//our current matrix)
loadIdentityTransform(¤tTransform[curGroupLevel]);
//apply passed in rotate to identity. so that it's first (reversing
//order)
applyTransform(rotateTransform(angle,x,y,z), ¤tTransform[curGroupLevel]);
//now put save matrix on to transform passed in. (reversing order)
applyTransform( tempSave, ¤tTransform[curGroupLevel]);
}
else
{
fprintf(stderr, "Error: Unknown cmd '%s' in description file\n", cmd);
fprintf(stderr, "Line %d\n", line);
exit(-1);
}
fscanf(SceneFile, "%s", cmd); //get next command
line++;
}
fclose(SceneFile); //close the scene file
}
