void WorldRenderer::CreateShadowMap(const corgi::CameraInterface& camera,
fplbase::Renderer& renderer, World* world) {
float shadow_map_resolution = static_cast<float>(
world->config->rendering_config()->shadow_map_resolution());
float shadow_map_zoom = world->config->rendering_config()->shadow_map_zoom();
float shadow_map_offset =
world->config->rendering_config()->shadow_map_offset();
vec3 light_position =
LoadVec3(world->config->rendering_config()->light_position());
SetLightPosition(light_position);
light_camera_.set_viewport_angle(kShadowMapViewportAngle / shadow_map_zoom);
light_camera_.set_viewport_resolution(
vec2(shadow_map_resolution, shadow_map_resolution));
vec3 light_camera_focus =
camera.position() + camera.facing() * shadow_map_offset;
light_camera_focus.z() = 0;
vec3 light_facing = light_camera_focus - light_camera_.position();
light_camera_.set_facing(light_facing.Normalized());
// Shadow map needs to be cleared to near-white, since that's
// the maximum (furthest) depth.
shadow_map_.SetAsRenderTarget();
renderer.ClearFrameBuffer(kShadowMapClearColor);
renderer.SetCulling(fplbase::Renderer::kCullBack);
depth_shader_->Set(renderer);
// Generate the shadow map:
// TODO - modify this so that shadowcast is its own render pass
for (int pass = 0; pass < corgi::RenderPass_Count; pass++) {
world->render_mesh_component.RenderPass(pass, light_camera_,
renderer, depth_shader_);
}
}
void WorldRenderer::CreateShadowMap(const corgi::CameraInterface &camera,
fplbase::Renderer &renderer, World *world) {
PushDebugMarker("CreateShadowMap");
PushDebugMarker("Setup");
float shadow_map_resolution = static_cast<float>(
world->config->rendering_config()->shadow_map_resolution());
float shadow_map_zoom = world->config->rendering_config()->shadow_map_zoom();
float shadow_map_offset =
world->config->rendering_config()->shadow_map_offset();
LightComponent *light_component =
world->entity_manager.GetComponent<LightComponent>();
const EntityRef &main_light_entity = light_component->begin()->entity;
const TransformData *light_transform =
world->entity_manager.GetComponentData<TransformData>(main_light_entity);
vec3 light_position = light_transform->position;
SetLightPosition(light_position);
float viewport_angle =
world->config->rendering_config()->shadow_map_viewport_angle() *
kDegreesToRadians;
light_camera_.set_viewport_angle(viewport_angle / shadow_map_zoom);
light_camera_.set_viewport_resolution(
vec2(shadow_map_resolution, shadow_map_resolution));
vec3 light_camera_focus =
camera.position() + camera.facing() * shadow_map_offset;
light_camera_focus.z = 0;
vec3 light_facing = light_camera_focus - light_camera_.position();
light_camera_.set_facing(light_facing.Normalized());
// Shadow map needs to be cleared to near-white, since that's
// the maximum (furthest) depth.
shadow_map_.SetAsRenderTarget();
renderer.ClearFrameBuffer(kShadowMapClearColor);
renderer.SetCulling(fplbase::kCullingModeBack);
depth_shader_->Set(renderer);
depth_skinned_shader_->Set(renderer);
// Generate the shadow map:
// TODO - modify this so that shadowcast is its own render pass
PopDebugMarker(); // Setup
for (int pass = 0; pass < corgi::RenderPass_Count; pass++) {
PushDebugMarker("RenderPass");
world->render_mesh_component.RenderPass(pass, light_camera_, renderer,
ShaderIndex_Depth);
PopDebugMarker();
}
fplbase::RenderTarget::ScreenRenderTarget(renderer).SetAsRenderTarget();
PopDebugMarker(); // CreateShadowMap
}
bool EditorController::GetMouseWorldRay(const corgi::CameraInterface& camera,
const vec2i& screen_size, vec3* near,
vec3* far) const {
float fov_y_tan = 2 * tan(camera.viewport_angle() * 0.5f);
float fov_x_tan = fov_y_tan * camera.viewport_resolution().x() /
camera.viewport_resolution().y();
vec2 pointer = vec2(fov_x_tan, -fov_y_tan) *
(GetPointer() / vec2(screen_size) - vec2(0.5f, 0.5f));
// pointer goes from (-tan(FOVx)/2, tan(FOVy)/2) to (tan(FOVx)/2,
// -tan(FOVy)/2) (upper right to lower left); 0,0 is center of screen.
vec3 forward = camera.facing().Normalized();
vec3 up = camera.up().Normalized();
vec3 right = vec3::CrossProduct(forward, up).Normalized();
up = vec3::CrossProduct(right, forward).Normalized();
*near = camera.position();
*far = camera.position() + forward + up * pointer.y() + right * pointer.x();
return true;
}
// Draw the shadow map in the world, so we can see it.
void WorldRenderer::DebugShowShadowMap(const corgi::CameraInterface& camera,
fplbase::Renderer& renderer) {
fplbase::RenderTarget::ScreenRenderTarget(renderer).SetAsRenderTarget();
static const mat4 kDebugTextureWorldTransform =
mat4::FromScaleVector(mathfu::vec3(10.0f, 10.0f, 10.0f));
const mat4 mvp = camera.GetTransformMatrix() * kDebugTextureWorldTransform;
const mat4 world_matrix_inverse = kDebugTextureWorldTransform.Inverse();
renderer.set_camera_pos(world_matrix_inverse * camera.position());
renderer.set_light_pos(world_matrix_inverse * light_camera_.position());
renderer.set_model_view_projection(mvp);
renderer.set_color(vec4(1.0f, 1.0f, 1.0f, 1.0f));
shadow_map_.BindAsTexture(0);
textured_shader_->Set(renderer);
// Render a large quad in the world, with the shadowmap texture on it:
fplbase::Mesh::RenderAAQuadAlongX(vec3(0.0f, 0.0f, 0.0f),
vec3(10.0f, 0.0f, 10.0f),
vec2(1.0f, 0.0f), vec2(0.0f, 1.0f));
}