Calculation mistake of diffuse coloring on pixels with multiple objects
I am making a raytracer and I added diffuse coloring. Actually, it is working but if there are multiple objects in a pixel it doesn't give correct result. However, If I remove one object and render image it gives correct result. By the way, sphere is front of mesh I checked it. I mean
It adds just ambient lighting because the diffuse color function returns zero since N.L is negative.
What can I do? I mean is it a common mistake for ray tracing?
Solution
You might want to check for the part that intersects your ray with the sphere, and the plane, and returns the closest hit.
For the black pixels on the bottom sphere, the following should happen:
- calculate intersection with sphere, get back a hit with distance d0
- calculate intersection with plane, get back a hit with distance d1
- whichever distance is smaller (d0 or d1) is the hit you want to use for shading your pixel. so among your hits, find the one with minimum distance. if the distance is infinity then return the background color (black in your case)
- How portable is code with #pragma optimize?
- Make warn_unused_result applied to all function with GCC
- Multiple threads and CPU cache
- Linking error vs. compilation error
- how to compile multiple instances of a source file linking to it different files.o
- Background compile in VS2010 and C/C++
- What Turing complete macro languages are available for C/C++
- How to use Cython to compile Python 3 into C
- Are forward declarations needed when the typedef declaration is done?
- How to assign real and imaginary parts of complex variables in C
- Strict aliasing between Complex numbers and real numbers in C
- How to CORRECTLY install gsl library in Linux?
- Using = operator on atomic variable?
- Unknown conversion types in this program I'm meant to compile
- Iterator in C language
- Treating __func__ as a string literal instead of a predefined identifier
- c - strcpy with struct string returning error
- Segmentation fault when executing a Python script in a C program?
- Questions about C Function Prototypes and Compilation
- What is the purpose of "-Wa,option" in GCC?
- Do we have c99 subflags
- netcat gcc compile option so that IDA pro can show function name
- What is the correct way to free output buffer after call to openssl::i2d_X509?
- How can I link C++ files to a C program?
- Why doesn't this program in C compile? Error: undefined reference to `i2c_smbus_read_byte_data'
- integer promotion isn't taken into account
- Why do I get a SEGFAULT when I try to sort an array of integers using K & R code examples?
- Are C preprocessor statements a part of the C language?
- FFMPEG Api conversion from YUV420P to RGB produces strange output
- Why is the tree constructed this way incorrect?