mitchellhansen/voxel-raycaster
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Fixed the camera coords in the view matrix. Tweaked cam position in kernel, odd off by one error.

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MitchellHansen
2017-01-01 17:23:23 -08:00
parent bb9fab6305
commit f8be952a9b
2 changed files with 17 additions and 13 deletions
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16
kernels/ray_caster_kernel.cl
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@@ -105,8 +105,6 @@ __kernel void raycaster(
int random_number = rand(&seed);
seed_memory[global_id] = seed;
size_t id = get_global_id(0);
int2 pixel = {id % (*resolution).x, id / (*resolution).x};
float3 ray_dir = projection_matrix[pixel.x + (*resolution).x * pixel.y];
@@ -116,13 +114,14 @@ __kernel void raycaster(
return;
}
// Pitch
ray_dir = (float3)(
// 1.57s are temp fix until view matrix is tweaked
ray_dir.z * sin((*cam_dir).x - 1.57) + ray_dir.x * cos((*cam_dir).x - 1.57),
ray_dir.z * sin((*cam_dir).x) + ray_dir.x * cos((*cam_dir).x),
ray_dir.y,
ray_dir.z * cos((*cam_dir).x - 1.57) - ray_dir.x * sin((*cam_dir).x - 1.57)
ray_dir.z * cos((*cam_dir).x) - ray_dir.x * sin((*cam_dir).x)
);
// Yaw
ray_dir = (float3)(
ray_dir.x * cos((*cam_dir).y) - ray_dir.y * sin((*cam_dir).y),
ray_dir.x * sin((*cam_dir).y) + ray_dir.y * cos((*cam_dir).y),
@@ -134,7 +133,9 @@ __kernel void raycaster(
voxel_step *= (ray_dir > 0) - (ray_dir < 0);
// Setup the voxel coords from the camera origin
int3 voxel = convert_int3(*cam_pos);
// Off by one error here in regards to the camera position.
// Will need to hunt this down later
int3 voxel = convert_int3(*cam_pos + 1);
// Delta T is the units a ray must travel along an axis in order to
// traverse an integer split
@@ -144,9 +145,6 @@ __kernel void raycaster(
float3 offset = ((*cam_pos) - floor(*cam_pos)) * convert_float3(voxel_step);
//offset.x += delta_t.x * convert_float((voxel_step.x < 0));
//offset -= delta_t * floor(offset / delta_t);
// Intersection T is the collection of the next intersection points
// for all 3 axis XYZ.
float3 intersection_t = delta_t * offset;

8
src/Hardware_Caster.cpp
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@@ -132,7 +132,6 @@ void Hardware_Caster::create_viewport(int width, int height, float v_fov, float
static_cast<float>(ray.z * cos(y_increment_radians * y) - ray.x * sin(y_increment_radians * y))
);
// Z axis, yaw
ray = sf::Vector3f(
static_cast<float>(ray.x * cos(x_increment_radians * x) - ray.y * sin(x_increment_radians * x)),
@@ -140,6 +139,13 @@ void Hardware_Caster::create_viewport(int width, int height, float v_fov, float
static_cast<float>(ray.z)
);
// correct for the base ray pointing to (1, 0, 0) as (0, 0). Should equal (1.57, 0)
ray = sf::Vector3f(
static_cast<float>(ray.z * sin(-1.57) + ray.x * cos(-1.57)),
static_cast<float>(ray.y),
static_cast<float>(ray.z * cos(-1.57) - ray.x * sin(-1.57))
);
int index = (x + view_res.x / 2) + view_res.x * (y + view_res.y / 2);
ray = Normalize(ray);