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Light CSM work

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This commit is contained in:
Antoine Pilote
2021-06-19 15:46:42 -04:00
parent 1d4ebf71da
commit a211a90015
1 changed files with 25 additions and 16 deletions
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41
Nuake/src/Scene/Components/LightComponent.h
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@@ -7,6 +7,7 @@
#include "BaseComponent.h"
#include "../Resource/Serializable.h"
#include <glm\ext\matrix_clip_space.hpp>
enum LightType {
Directional, Point, Spot
};
@@ -29,6 +30,9 @@ public:
float LinearAttenuation = 0.0f;
float QuadraticAttenuation = 0.0f;
std::vector<glm::mat4> mViewProjections;
std::vector<float> mCascadeSplitDepth;
LightComponent();
glm::mat4 GetProjection();
@@ -49,6 +53,8 @@ public:
void SetType(LightType type);
std::vector<int> mCascadeSplits;
void CalculateViewProjection(glm::mat4& view, const glm::mat4& projection, const glm::vec3& normalizedDirection)
{
glm::mat4 viewProjection = projection * view;
@@ -59,6 +65,9 @@ public:
const float farClip = 1000.0f;
const float clipRange = farClip - nearClip;
const float mCascadeNearPlaneOffset = 0.0;
const float mCascadeFarPlaneOffset = 0.0;
// Calculate the optimal cascade distances
const float minZ = nearClip;
const float maxZ = nearClip + clipRange;
@@ -69,13 +78,13 @@ public:
const float p = (i + 1) / static_cast<float>(4);
const float log = minZ * glm::pow(ratio, p);
const float uniform = minZ + range * p;
//const float d = 0.91f * (log - uniform) + uniform;
//mCascadeSplits[i] = (d - nearClip) / clipRange;
const float d = 0.91f * (log - uniform) + uniform;
mCascadeSplits[i] = (d - nearClip) / clipRange;
}
//mCascadeSplits[0] = 0.2f;
//mCascadeSplits[1] = 0.45f;
//mCascadeSplits[2] = 1.0f;
mCascadeSplits[0] = 0.2f;
mCascadeSplits[1] = 0.45f;
mCascadeSplits[2] = 1.0f;
float lastSplitDist = 0.0f;
// Calculate Orthographic Projection matrix for each cascade
@@ -130,22 +139,22 @@ public:
// Calculate the view and projection matrix
glm::vec3 lightDir = -normalizedDirection;
glm::mat4 lightViewMatrix = glm::lookAt(frustumCenter - lightDir * -minExtents.z, frustumCenter, glm::vec3(0.0f, 0.0f, 1.0f));
//glm::mat4 lightProjectionMatrix = glm::ortho(minExtents.x, maxExtents.x, minExtents.y, maxExtents.y, 0.0f + mCascadeNearPlaneOffset, maxExtents.z - minExtents.z + mCascadeFarPlaneOffset);
glm::mat4 lightProjectionMatrix = glm::ortho(minExtents.x, maxExtents.x, minExtents.y, maxExtents.y, 0.0f + mCascadeNearPlaneOffset, maxExtents.z - minExtents.z + mCascadeFarPlaneOffset);
// Offset to texel space to avoid shimmering ->(https://stackoverflow.com/questions/33499053/cascaded-shadow-map-shimmering)
//glm::mat4 shadowMatrix = lightProjectionMatrix * lightViewMatrix;
glm::mat4 shadowMatrix = lightProjectionMatrix * lightViewMatrix;
const float ShadowMapResolution = 4096;
//glm::vec4 shadowOrigin = (shadowMatrix * glm::vec4(0.0f, 0.0f, 0.0f, 1.0f)) * ShadowMapResolution / 2.0f;
//glm::vec4 roundedOrigin = glm::round(shadowOrigin);
//glm::vec4 roundOffset = roundedOrigin - shadowOrigin;
//roundOffset = roundOffset * 2.0f / ShadowMapResolution;
//roundOffset.z = 0.0f;
//roundOffset.w = 0.0f;
//lightProjectionMatrix[3] += roundOffset;
glm::vec4 shadowOrigin = (shadowMatrix * glm::vec4(0.0f, 0.0f, 0.0f, 1.0f)) * ShadowMapResolution / 2.0f;
glm::vec4 roundedOrigin = glm::round(shadowOrigin);
glm::vec4 roundOffset = roundedOrigin - shadowOrigin;
roundOffset = roundOffset * 2.0f / ShadowMapResolution;
roundOffset.z = 0.0f;
roundOffset.w = 0.0f;
lightProjectionMatrix[3] += roundOffset;
// Store SplitDistance and ViewProjection-Matrix
//mCascadeSplitDepth[cascade] = (nearClip + splitDist * clipRange) * 1.0f;
//mViewProjections[cascade] = lightProjectionMatrix * lightViewMatrix;
mCascadeSplitDepth[cascade] = (nearClip + splitDist * clipRange) * 1.0f;
mViewProjections[cascade] = lightProjectionMatrix * lightViewMatrix;
lastSplitDist = mCascadeSplits[cascade];
// -----------------------Debug only-----------------------