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Code Issues 144 Wiki Activity

Light the cab with the sun coming in through its windows

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This commit is contained in:
Hirek
2026-10-28 12:19:43 +01:00
parent 1447dcf075
commit e8a90507f0
28 changed files with 342 additions and 29 deletions
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13
rendering/opengl46/opengl46cabprobe.cpp
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@@ -82,6 +82,7 @@ void opengl46_cab_probe::bind()
{
glBindTextureUnit(gl::CAB_PROBE_TEX, (m_light != 0) ? m_light : m_empty);
glBindTextureUnit(gl::CAB_PROBE_ALBEDO_TEX, (m_albedo != 0) ? m_albedo : m_empty);
glBindTextureUnit(gl::CAB_PROBE_MASK_TEX, (m_mask != 0) ? m_mask : m_empty);
if (m_sh)
m_sh->bind_base();
}
@@ -91,6 +92,13 @@ bool opengl46_cab_probe::gpu_allocate(int const Size)
m_light = make_cube(GL_RGBA16F, Size, true);
m_albedo = make_cube(GL_RGBA8, Size, true);
m_depth = make_cube(GL_DEPTH_COMPONENT32F, Size, false);
// the mask: the level of the albedo of at most CAB_PROBE_MASK_SIZE pixels a face, as mask_size() has it once the size is set
auto masksize{Size};
while (masksize > static_cast<int>(gl::CAB_PROBE_MASK_SIZE))
masksize >>= 1;
m_mask = make_cube(GL_RGBA8, std::max(masksize, 1), false);
glTextureParameteri(m_mask, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTextureParameteri(m_mask, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// all the faces at once, the geometry shader picks the face
glCreateFramebuffers(1, &m_framebuffer);
glNamedFramebufferTexture(m_framebuffer, GL_COLOR_ATTACHMENT0, m_light, 0);
@@ -106,7 +114,7 @@ void opengl46_cab_probe::gpu_release()
{
if (m_framebuffer != 0)
glDeleteFramebuffers(1, &m_framebuffer);
for (auto *texture : {&m_light, &m_albedo, &m_depth})
for (auto *texture : {&m_light, &m_albedo, &m_depth, &m_mask})
{
if (*texture != 0)
glDeleteTextures(1, texture);
@@ -143,6 +151,9 @@ void opengl46_cab_probe::gpu_end()
gl::framebuffer::unbind();
glGenerateTextureMipmap(m_light);
glGenerateTextureMipmap(m_albedo);
// where the windows are, for the next drawing
auto const masksize{mask_size()};
glCopyImageSubData(m_albedo, GL_TEXTURE_CUBE_MAP, mask_level(), 0, 0, 0, m_mask, GL_TEXTURE_CUBE_MAP, 0, 0, 0, 0, masksize, masksize, 6);
// the light the cab lights itself with again, from a small level of the light reflected
glBindTextureUnit(0, m_light);
glProgramUniform2i(*m_sh_program, SH_LEVEL_LOCATION, sh_level(), sh_size());