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Simplified shadowmaps-simple example.

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This commit is contained in:
Branimir Karadžić 2014-02-22 13:36:31 -08:00
parent b09018df86
commit 70796a4f41
1 changed files with 83 additions and 84 deletions
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167
examples/15-shadowmaps-simple/shadowmaps_simple.cpp
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@ -16,7 +16,10 @@
#include "fpumath.h"
#define RENDER_SHADOW_PASS_ID 0
#define RENDER_SHADOW_PASS_BIT (1<<RENDER_SHADOW_PASS_ID)
#define RENDER_SCENE_PASS_ID 1
#define RENDER_SCENE_PASS_BIT (1<<RENDER_SCENE_PASS_ID)
uint32_t packUint32(uint8_t _x, uint8_t _y, uint8_t _z, uint8_t _w)
{
@ -382,6 +385,33 @@ struct Mesh
}
}
void submitShadow(uint8_t _view, float* _mtx, bgfx::ProgramHandle _program)
{
for (GroupArray::const_iterator it = m_groups.begin(), itEnd = m_groups.end(); it != itEnd; ++it)
{
const Group& group = *it;
// Set model matrix for rendering.
bgfx::setTransform(_mtx);
bgfx::setProgram(_program);
bgfx::setIndexBuffer(group.m_ibh);
bgfx::setVertexBuffer(group.m_vbh);
// Set render states.
bgfx::setState(0
|BGFX_STATE_RGB_WRITE
|BGFX_STATE_ALPHA_WRITE
|BGFX_STATE_DEPTH_WRITE
|BGFX_STATE_DEPTH_TEST_LESS
|BGFX_STATE_CULL_CCW
|BGFX_STATE_MSAA
);
// Submit primitive for rendering.
bgfx::submit(_view);
}
}
bgfx::VertexDecl m_decl;
typedef std::vector<Group> GroupArray;
GroupArray m_groups;
@ -512,54 +542,30 @@ int _main_(int /*_argc*/, char** /*_argv*/)
// Setup instance matrices.
float mtxFloor[16];
mtxScaleRotateTranslate(mtxFloor
, 30.0f //scaleX
, 30.0f //scaleY
, 30.0f //scaleZ
, 0.0f //rotX
, 0.0f //rotY
, 0.0f //rotZ
, 0.0f //translateX
, 0.0f //translateY
, 0.0f //translateZ
, 30.0f, 30.0f, 30.0f
, 0.0f, 0.0f, 0.0f
, 0.0f, 0.0f, 0.0f
);
float mtxBunny[16];
mtxScaleRotateTranslate(mtxBunny
, 5.0f
, 5.0f
, 5.0f
, 0.0f
, float(M_PI) - timeAccumulatorScene
, 0.0f
, 15.0f
, 5.0f
, 0.0f
, 5.0f, 5.0f, 5.0f
, 0.0f, float(M_PI) - timeAccumulatorScene, 0.0f
, 15.0f, 5.0f, 0.0f
);
float mtxHollowcube[16];
mtxScaleRotateTranslate(mtxHollowcube
, 2.5f
, 2.5f
, 2.5f
, 0.0f
, 1.56f - timeAccumulatorScene
, 0.0f
, 0.0f
, 10.0f
, 0.0f
, 2.5f, 2.5f, 2.5f
, 0.0f, 1.56f - timeAccumulatorScene, 0.0f
, 0.0f, 10.0f, 0.0f
);
float mtxCube[16];
mtxScaleRotateTranslate(mtxCube
, 2.5f
, 2.5f
, 2.5f
, 0.0f
, 1.56f - timeAccumulatorScene
, 0.0f
, -15.0f
, 5.0f
, 0.0f
, 2.5f, 2.5f, 2.5f
, 0.0f, 1.56f - timeAccumulatorScene, 0.0f
, -15.0f, 5.0f, 0.0f
);
// Define matrices.
@ -584,66 +590,59 @@ int _main_(int /*_argc*/, char** /*_argv*/)
mtxOrtho(lightProj, -area, area, -area, area, -100.0f, 100.0f);
bgfx::setViewRect(RENDER_SHADOW_PASS_ID, 0, 0, shadowMapSize, shadowMapSize);
bgfx::setViewRect(RENDER_SCENE_PASS_ID, 0, 0, width, height);
bgfx::setViewFrameBuffer(RENDER_SHADOW_PASS_ID, s_shadowMapFB);
bgfx::setViewTransform(RENDER_SHADOW_PASS_ID, lightView, lightProj);
bgfx::setViewRect(RENDER_SCENE_PASS_ID, 0, 0, width, height);
bgfx::setViewTransform(RENDER_SCENE_PASS_ID, view, proj);
bgfx::setViewFrameBuffer(RENDER_SHADOW_PASS_ID, s_shadowMapFB);
// Clear backbuffer and shadowmap framebuffer at beginning.
bgfx::setViewClearMask(0x3, BGFX_CLEAR_COLOR_BIT | BGFX_CLEAR_DEPTH_BIT, 0x303030ff, 1.0f, 0);
bgfx::submitMask(0x3);
bgfx::setViewClearMask(RENDER_SHADOW_PASS_BIT|RENDER_SCENE_PASS_BIT
, BGFX_CLEAR_COLOR_BIT | BGFX_CLEAR_DEPTH_BIT
, 0x303030ff, 1.0f, 0
);
bgfx::submitMask(RENDER_SHADOW_PASS_BIT|RENDER_SCENE_PASS_BIT);
// Render.
float mtxShadow[16];
float lightMtx[16];
{ // Craft shadow map.
const float sy = s_flipV ? 0.5f : -0.5f;
const float mtxCrop[16] =
{
0.5f, 0.0f, 0.0f, 0.0f,
0.0f, sy, 0.0f, 0.0f,
0.0f, 0.0f, 0.5f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f,
};
hplaneMesh.submit(RENDER_SHADOW_PASS_ID, mtxFloor, progPackDepth);
bunnyMesh.submit(RENDER_SHADOW_PASS_ID, mtxBunny, progPackDepth);
hollowcubeMesh.submit(RENDER_SHADOW_PASS_ID, mtxHollowcube, progPackDepth);
cubeMesh.submit(RENDER_SHADOW_PASS_ID, mtxCube, progPackDepth);
}
float mtxTmp[16];
mtxMul(mtxTmp, lightProj, mtxCrop);
mtxMul(mtxShadow, lightView, mtxTmp);
{ // Draw Scene.
// Floor.
mtxMul(lightMtx, mtxFloor, mtxShadow);
bgfx::setUniform(u_lightMtx, lightMtx);
hplaneMesh.submit(RENDER_SCENE_PASS_ID, mtxFloor, progDraw);
hplaneMesh.submitShadow(RENDER_SHADOW_PASS_ID, mtxFloor, progPackDepth);
float mtxShadow[16]; //lightviewProjCrop
float lightMtx[16]; //modelLightviewProjCrop
// Bunny.
mtxMul(lightMtx, mtxBunny, mtxShadow);
bgfx::setUniform(u_lightMtx, lightMtx);
bunnyMesh.submit(RENDER_SCENE_PASS_ID, mtxBunny, progDraw);
bunnyMesh.submitShadow(RENDER_SHADOW_PASS_ID, mtxBunny, progPackDepth);
const float s = (s_flipV) ? 1.0f : -1.0f; //sign
// Hollow cube.
mtxMul(lightMtx, mtxHollowcube, mtxShadow);
bgfx::setUniform(u_lightMtx, lightMtx);
hollowcubeMesh.submit(RENDER_SCENE_PASS_ID, mtxHollowcube, progDraw);
hollowcubeMesh.submitShadow(RENDER_SHADOW_PASS_ID, mtxHollowcube, progPackDepth);
const float mtxCrop[16] =
{
0.5f, 0.0f, 0.0f, 0.0f,
0.0f, s*0.5f, 0.0f, 0.0f,
0.0f, 0.0f, 0.5f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f,
};
float mtxTmp[16];
mtxMul(mtxTmp, lightProj, mtxCrop);
mtxMul(mtxShadow, lightView, mtxTmp);
// Floor.
mtxMul(lightMtx, mtxFloor, mtxShadow);
bgfx::setUniform(u_lightMtx, lightMtx);
hplaneMesh.submit(RENDER_SCENE_PASS_ID, mtxFloor, progDraw);
// Bunny.
mtxMul(lightMtx, mtxBunny, mtxShadow);
bgfx::setUniform(u_lightMtx, lightMtx);
bunnyMesh.submit(RENDER_SCENE_PASS_ID, mtxBunny, progDraw);
// Hollow cube.
mtxMul(lightMtx, mtxHollowcube, mtxShadow);
bgfx::setUniform(u_lightMtx, lightMtx);
hollowcubeMesh.submit(RENDER_SCENE_PASS_ID, mtxHollowcube, progDraw);
// Cube.
mtxMul(lightMtx, mtxCube, mtxShadow);
bgfx::setUniform(u_lightMtx, lightMtx);
cubeMesh.submit(RENDER_SCENE_PASS_ID, mtxCube, progDraw);
}
// Cube.
mtxMul(lightMtx, mtxCube, mtxShadow);
bgfx::setUniform(u_lightMtx, lightMtx);
cubeMesh.submit(RENDER_SCENE_PASS_ID, mtxCube, progDraw);
cubeMesh.submitShadow(RENDER_SHADOW_PASS_ID, mtxCube, progPackDepth);
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.