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Splits kind of correctly shown

simple_math_single_header
Martin Felis 2018-06-29 20:58:01 +02:00
parent 45e0dd9a9a
commit f5504efea7
2 changed files with 37 additions and 28 deletions
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63
src/modules/RenderModule.cc
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@ -798,19 +798,20 @@ void Renderer::DebugDrawShadowCascades() {
gVertexArray.Bind();
float fov = 45.0f;
float fov = 50.0f;
float aspect = 1.0f;
float near = 0.5f;
float near = 0.01f;
float far = 10.0f;
float length = far - near;
float split_near = near;
float tan_half_hfov = tan(0.5f * fov * M_PI / 180.0f);
float tan_half_vfov = tan(0.5f * aspect * fov * M_PI / 180.0f);
float tan_half_hfov = tanf(0.5f * fov * M_PI / 180.0f);
float tan_half_vfov = tanf(0.5f * aspect * fov * M_PI / 180.0f);
// for (int i = 0; i < mLight.mShadowSplits.size(); ++i) {
for (int i = 0; i < 1; ++i) {
float split_far = mLight.mShadowSplits[i] * length;
for (int i = 0; i < 3; ++i) {
split_near = near + mLight.mShadowSplits[i] * length;
float split_far = near + mLight.mShadowSplits[i + 1] * length;
Matrix44f view_frustum = Perspective (fov, aspect, split_near, split_far).inverse();
@ -823,10 +824,10 @@ void Renderer::DebugDrawShadowCascades() {
mSimpleProgram.SetVec4("uColor", Vector4f (1.0f, 0.0f, 1.0f, 1.0f));
gUnitCubeLines.Draw(GL_LINES);
float xn = split_near * tan_half_hfov;
float xf = split_far * tan_half_hfov;
float yn = split_near * tan_half_vfov;
float yf = split_far * tan_half_vfov;
float xn = split_near * tan_half_vfov;
float xf = split_far * tan_half_vfov;
float yn = split_near * tan_half_hfov;
float yf = split_far * tan_half_hfov;
Vector4f frustum_corners[] = {
Vector4f (xn, yn, split_near, 1.0f),
@ -834,25 +835,30 @@ void Renderer::DebugDrawShadowCascades() {
Vector4f (xn, -yn, split_near, 1.0f),
Vector4f (-xn, -yn, split_near, 1.0f),
Vector4f (xn, yn, split_far, 1.0f),
Vector4f (-xn, yn, split_far, 1.0f),
Vector4f (xn, -yn, split_far, 1.0f),
Vector4f (-xn, -yn, split_far, 1.0f)
Vector4f (xf, yf, split_far, 1.0f),
Vector4f (-xf, yf, split_far, 1.0f),
Vector4f (xf, -yf, split_far, 1.0f),
Vector4f (-xf, -yf, split_far, 1.0f)
};
Vector4f frustum_corners_world[8];
float min_x = std::numeric_limits<float>::max();
float max_x = std::numeric_limits<float>::min();
float max_x = -std::numeric_limits<float>::max();
float min_y = std::numeric_limits<float>::max();
float max_y = std::numeric_limits<float>::min();
float max_y = -std::numeric_limits<float>::max();
float min_z = std::numeric_limits<float>::max();
float max_z = std::numeric_limits<float>::min();
float max_z = -std::numeric_limits<float>::max();
for (int j = 0; j < 8; ++j) {
Vector4f v_world = view_frustum.transpose() * frustum_corners[j];
Vector4f v_world = frustum_corners[j];
frustum_corners_world[j] = v_world;
// gLog("vworld %d: %.3f, %.3f, %.3f, %.3f", j,
// v_world[0],
// v_world[1],
// v_world[2],
// v_world[3]);
min_x = fmin(min_x, frustum_corners_world[j][0]);
max_x = fmax(max_x, frustum_corners_world[j][0]);
@ -862,26 +868,29 @@ void Renderer::DebugDrawShadowCascades() {
max_z = fmax(max_z, frustum_corners_world[j][2]);
}
Vector3f dimensions (
// gLog ("min/max %.3f,%.3f, %.3f,%.3f, %.3f,%.3f",
// min_x, max_x,
// min_y, max_y,
// min_z, max_z
// );
Vector3f dimensions = Vector3f(
max_x - min_x,
max_y - min_y,
(split_far - split_near)
// max_z - min_z
);
max_z - min_z
) * 0.5f;
Vector3f center = Vector3f (min_x, min_y, min_z) + dimensions * 0.5f;
Vector3f center = Vector3f (min_x, min_y, min_z) + dimensions;
model_view_projection =
TranslateMat44(center[0], center[1], center[2])
* ScaleMat44 (dimensions[0], dimensions[1], dimensions[2])
ScaleMat44 (dimensions[0], dimensions[1], dimensions[2])
* TranslateMat44(center[0], center[1], -center[2])
* mCamera.mViewMatrix
* mCamera.mProjectionMatrix;
mSimpleProgram.SetMat44("uModelViewProj", model_view_projection);
mSimpleProgram.SetVec4("uColor", Vector4f (0.0f, 1.0f, 1.0f, 1.0f));
gUnitCubeLines.Draw(GL_LINES);
split_near = split_far;
}
// Disable wireframe

2
src/modules/RenderModule.h
View File

@ -25,7 +25,7 @@ struct Light {
float mShadowMapBias;
uint16_t mShadowMapSize;
Vector4f mShadowSplits = Vector4f (0.1f, 0.3f, 0.7f, 1.0f);
Vector4f mShadowSplits = Vector4f (0.0, 0.1, 0.4, 1.0);
float mNear;
float mFar;