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voxel-raycaster
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Added color to lights, added a gui slider to control the single light color

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master
MitchellHansen 8 years ago
parent 4549428954
commit 6a3eaa04f7
6 changed files with 77 additions and 47 deletions
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5
include/raycaster/Hardware_Caster.h
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@ -41,6 +41,11 @@ struct device {
bool cl_gl_sharing = false;
};
struct raycaster_settings {
};
struct PackedData;
class Hardware_Caster : public RayCaster

85
kernels/ray_caster_kernel.cl
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@ -20,16 +20,16 @@ float4 white_light(float4 input, float3 light, int3 mask) {
// {r, g, b, i, x, y, z, x', y', z'}
float4 view_light(float4 in_color, float3 light, float3 view, int3 mask) {
float4 view_light(float4 in_color, float3 light, float4 light_color, float3 view, int3 mask) {
float diffuse = max(dot(normalize(convert_float3(mask)), normalize(light)), 0.0f);
in_color += diffuse * 0.2;
in_color += diffuse * 0.2f * light_color; //(float4)(1.0f, 1.0f, 0.0f, 1.0f);
if (dot(light, normalize(convert_float3(mask))) > 0.0)
if (dot(light, normalize(convert_float3(mask))) > 0.0f)
{
float3 halfwayVector = normalize(normalize(light) + normalize(view));
float specTmp = max(dot(normalize(convert_float3(mask)), halfwayVector), 0.0f);
in_color += pow(specTmp, 1.0f) * 0.5;
in_color += pow(specTmp, 1.0f) * 0.5f * light_color;//(float4)(1.0f, 1.0f, 0.0f, 0.0f);
}
//in_color += 0.02;
@ -59,8 +59,8 @@ bool cast_light_intersection_ray(
float3 ray_dir,
float3 ray_pos,
global float* lights,
global int* light_count
global int* light_count
){
float distance_to_light = DistanceBetweenPoints(ray_pos, (float3)(lights[4], lights[5], lights[6]));
@ -75,7 +75,7 @@ bool cast_light_intersection_ray(
// Delta T is the units a ray must travel along an axis in order to
// traverse an integer split
float3 delta_t = fabs(1.0f / ray_dir);
// offset is how far we are into a voxel, enables sub voxel movement
float3 offset = ((ray_pos)-floor(ray_pos)) * convert_float3(voxel_step);
@ -114,9 +114,9 @@ bool cast_light_intersection_ray(
//} while (any(isless(intersection_t, (float3)(distance_to_light - 1))));
} while (intersection_t.x < distance_to_light - 1 ||
intersection_t.y < distance_to_light - 1 ||
intersection_t.y < distance_to_light - 1 ||
intersection_t.z < distance_to_light - 1 );
return false;
}
@ -125,23 +125,23 @@ bool cast_light_intersection_ray(
// ==================================================================================================
__kernel void raycaster(
global char* map,
global int3* map_dim,
global int2* resolution,
global float3* projection_matrix,
global float2* cam_dir,
global float3* cam_pos,
global float* lights,
global int* light_count,
__write_only image2d_t image,
global int* seed_memory,
__read_only image2d_t texture_atlas,
global int2 *atlas_dim,
global int2 *tile_dim
global char* map,
global int3* map_dim,
global int2* resolution,
global float3* projection_matrix,
global float2* cam_dir,
global float3* cam_pos,
global float* lights,
global int* light_count,
__write_only image2d_t image,
global int* seed_memory,
__read_only image2d_t texture_atlas,
global int2 *atlas_dim,
global int2 *tile_dim
){
int global_id = get_global_id(0);
// Get and set the random seed from seed memory
int seed = seed_memory[global_id];
int random_number = rand(&seed);
@ -170,7 +170,7 @@ __kernel void raycaster(
ray_dir.z
);
// Setup the voxel step based on what direction the ray is pointing
int3 voxel_step = {1, 1, 1};
voxel_step *= (ray_dir > 0) - (ray_dir < 0);
@ -184,7 +184,7 @@ __kernel void raycaster(
// offset is how far we are into a voxel, enables sub voxel movement
float3 offset = ((*cam_pos) - floor(*cam_pos)) * convert_float3(voxel_step);
// Intersection T is the collection of the next intersection points
// for all 3 axis XYZ.
@ -192,19 +192,19 @@ __kernel void raycaster(
// for negative values, wrap around the delta_t
intersection_t += delta_t * -convert_float3(isless(intersection_t, 0));
// Hard cut-off for how far the ray can travel
int max_dist = 800;
int dist = 0;
int3 face_mask = { 0, 0, 0 };
float4 fog_color = { 0.73, 0.81, 0.89, 0.8 };
float4 voxel_color = (float4)(0.50, 0.0, 0.50, 0.1);
float4 overshoot_color = { 0.25, 0.48, 0.52, 0.8 };
float4 overshoot_color_2 = { 0.25, 0.1, 0.52, 0.8 };
float4 fog_color = { 0.73f, 0.81f, 0.89f, 0.8f };
float4 voxel_color = (float4)(0.50f, 0.0f, 0.50f, 0.1f);
float4 overshoot_color = { 0.25f, 0.48f, 0.52f, 0.8f };
float4 overshoot_color_2 = { 0.25f, 0.1f, 0.52f, 0.8f };
// Andrew Woo's raycasting algo
do {
@ -226,7 +226,7 @@ __kernel void raycaster(
write_imagef(image, pixel, white_light(mix(fog_color, overshoot_color_2, 1.0 - max(dist / 700.0f, (float)0)), (float3)(lights[7], lights[8], lights[9]), face_mask));
return;
}
// If we hit a voxel
int index = voxel.x + (*map_dim).x * (voxel.y + (*map_dim).z * (voxel.z));
int voxel_data = map[index];
@ -264,7 +264,7 @@ __kernel void raycaster(
float x_percent = (intersection_t.x - (intersection_t.z - delta_t.z)) / delta_t.x;
float y_percent = (intersection_t.y - (intersection_t.z - delta_t.z)) / delta_t.y;
face_position = (float3)(x_percent, y_percent, 1.001f);
tile_face_position = (float2)(x_percent, y_percent);
@ -307,28 +307,32 @@ __kernel void raycaster(
// just a plain color for the voxel color
if (voxel_data == 6) {
voxel_color = (float4)(0.0, 0.239, 0.419, 0.3);
voxel_color = (float4)(0.0f, 0.239f, 0.419f, 0.3f);
}
else if (voxel_data == 5) {
float2 tile_size = convert_float2(*atlas_dim / *tile_dim);
voxel_color = read_imagef(texture_atlas, convert_int2(tile_face_position * tile_size) + convert_int2((float2)(3, 0) * tile_size));
voxel_color.w = 0.3f;
//voxel_color = (float4)(0.25, 0.52, 0.30, 0.1);
}
else if (voxel_data == 1) {
voxel_color = (float4)(0.929, 0.957, 0.027, 0.7);
voxel_color = (float4)(0.929f, 0.957f, 0.027f, 0.3f);
}
//
//else {
// voxel_color = (float4)(1.0f, 0.0f, 0.0f, 0.0f);
//}
//
if (cast_light_intersection_ray(
map,
map_dim,
normalize((float3)(lights[4], lights[5], lights[6]) - (convert_float3(voxel) + face_position)),
(convert_float3(voxel) + face_position),
lights,
lights,
light_count
)) {
// If the light ray intersected an object on the way to the light point
float4 ambient_color = white_light(voxel_color, (float3)(lights[4], lights[5], lights[6]), face_mask);
write_imagef(image, pixel, ambient_color);
return;
@ -343,6 +347,7 @@ __kernel void raycaster(
view_light(
voxel_color,
(convert_float3(voxel) + face_position) - (float3)(lights[4], lights[5], lights[6]),
(float4)(lights[0], lights[1], lights[2], lights[3]),
(convert_float3(voxel) + face_position) - (*cam_pos),
face_mask * voxel_step
)
@ -360,4 +365,4 @@ __kernel void raycaster(
write_imagef(image, pixel, white_light(mix(fog_color, (float4)(0.40, 0.00, 0.40, 0.2), 1.0 - max(dist / 700.0f, (float)0)), (float3)(lights[7], lights[8], lights[9]), face_mask));
return;
}
}

4
src/LightHandle.cpp
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@ -50,7 +50,7 @@ void LightHandle::add_movement(sf::Vector3f movement)
void LightHandle::set_position(sf::Vector3f position)
{
data_reference->position = position;
}
void LightHandle::set_direction(sf::Vector3f direction)
@ -60,7 +60,7 @@ void LightHandle::set_direction(sf::Vector3f direction)
void LightHandle::set_rgbi(sf::Vector4f rgbi)
{
data_reference->rgbi = rgbi;
}
void LightHandle::recieve_event(VrEventPublisher* publisher, std::unique_ptr<vr::Event> event)

2
src/Old_Map.cpp
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@ -203,7 +203,7 @@ void Old_Map::generate_terrain() {
int z = static_cast<int>(height_map[x + y * dimensions.x]);
while (z > 0) {
while (z > 0 && z < dimensions.z) {
voxel_data[x + dimensions.x * (y + dimensions.z * z)] = 5;
z--;
}

15
src/main.cpp
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@ -143,7 +143,7 @@ int main() {
LightPrototype prototype(
sf::Vector3f(100.0f, 100.0f, 30.0f),
sf::Vector3f(-1.0f, -1.0f, -1.5f),
sf::Vector4f(1.0f, 1.0f, 1.0f, 1.0f)
sf::Vector4f(0.2f, 0.9f, 0.0f, 1.0f)
);
std::shared_ptr<LightHandle> handle(light_controller.create_light(prototype));
@ -178,6 +178,8 @@ int main() {
sf::Clock sf_delta_clock;
fps_counter fps;
float light_color[4] = { 0, 0, 0, 0 };
while (window.isOpen()) {
input_handler.consume_sf_events(&window);
@ -254,6 +256,17 @@ int main() {
ImGui::End();
ImGui::Begin("Lights");
if (ImGui::SliderFloat4("Color", light_color, 0, 1)) {
sf::Vector4f light(light_color[0], light_color[1], light_color[2], light_color[3]);
handle->set_rgbi(light);
}
ImGui::End();
ImGui::Render();

13
src/raycaster/Hardware_Caster.cpp
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@ -216,7 +216,7 @@ int Hardware_Caster::debug_quick_recompile()
}
validate();
return 1;
return 0;
}
void Hardware_Caster::test_edit_viewport(int width, int height, float v_fov, float h_fov)
@ -377,6 +377,11 @@ int Hardware_Caster::acquire_platform_and_device() {
current_best_device = device;
}
//if (device.type == CL_DEVICE_TYPE_CPU &&
// current_best_device.type != CL_DEVICE_TYPE_CPU) {
// current_best_device = device;
//}
// Get the unit with the higher compute units
if (device.comp_units > current_best_device.comp_units) {
current_best_device = device;
@ -390,6 +395,7 @@ int Hardware_Caster::acquire_platform_and_device() {
if (current_best_device.cl_gl_sharing == false && device.cl_gl_sharing == true) {
current_best_device = device;
}
}
}
@ -400,7 +406,8 @@ int Hardware_Caster::acquire_platform_and_device() {
std::cout << "Selected Platform : " << platform_id << std::endl;
std::cout << "Selected Device : " << device_id << std::endl;
std::cout << "Selected Name : " << current_best_device.name << std::endl;
std::cout << "Selected Version : " << current_best_device.version << std::endl;
if (current_best_device.cl_gl_sharing == false) {
std::cout << "This device does not support the cl_khr_gl_sharing extension" << std::endl;
return RayCaster::SHARING_NOT_SUPPORTED;
@ -538,7 +545,7 @@ int Hardware_Caster::compile_kernel(std::string kernel_source, bool is_path, std
kernel_map[kernel_name] = kernel;
//kernel_map.emplace(std::make_pair(kernel_name, kernel));
return 1;
return 0;
}
int Hardware_Caster::set_kernel_arg(

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