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[vulkan] Handle spotlights pointing -X

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The problem didn't show up until the switch to float depth buffers
(because they can store the resulting nan).
This commit is contained in:
Bill Currie 2023-12-19 17:56:13 +09:00
parent 2e9e247ca4
commit 0f24f10bb9
2 changed files with 6 additions and 7 deletions
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2
libs/video/renderer/vulkan/shader/light_splat.vert
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@ -18,7 +18,7 @@ from_to_rotation (vec3 a, vec3 b)
{
float d = dot (a + b, a + b);
float qc = sqrt (d);
vec3 qv = d > 1e-6 ? cross (a, b) / qc : vec3 (1, 0, 0);
vec3 qv = d > 1e-6 ? cross (a, b) / qc : vec3 (0, 0, 1);
return vec4 (qv, qc * 0.5);
}

11
libs/video/renderer/vulkan/vulkan_lighting.c
View file

@ -845,6 +845,7 @@ lighting_update_lights (const exprval_t **params, exprval_t *result,
QFV_PacketScatterBuffer (packet, lframe->entid_buffer, 1, &eid_scatter,
ir_barrier);
memset (lframe->id_radius, -1, MaxLights * sizeof (light_idrad_t));
for (int i = 0; i < ST_COUNT; i++) {
auto q = queue[i];
auto idr = &lframe->id_radius[q.start];
@ -2045,10 +2046,11 @@ create_light_matrices (lightingctx_t *lctx)
break;
case ST_CASCADE:
case ST_PLANE:
//FIXME will fail for -ref_direction
dir = light->direction;
dir[3] = 0;
mat4fquat (view, qrotf (dir, ref_direction));
vec4f_t q = dir[0] == -1 ? (vec4f_t) { 0, 0, 1, 0 }
: qrotf (dir, ref_direction);
mat4fquat (view, q);
break;
}
vec4f_t pos = -light->position;
@ -2100,13 +2102,10 @@ upload_light_matrices (lightingctx_t *lctx, vulkan_ctx_t *ctx)
}
QFV_PacketSubmit (packet);
// FIXME temporary until batched shadow rendering is implemented
packet = QFV_PacketAcquire (ctx->staging);
size_t id_size = sizeof (uint32_t[MaxLights * 6]);
uint32_t *id_data = QFV_PacketExtend (packet, id_size);
for (int i = 0; i < MaxLights * 6; i++) {
id_data[i] = i;
}
memset (id_data, -1, id_size);
for (size_t i = 0; i < lctx->frames.size; i++) {
auto lframe = &lctx->frames.a[i];
QFV_PacketCopyBuffer (packet, lframe->shadowmat_id_buffer, 0, bb);