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i guess it is working

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This commit is contained in:
Nishi 2026-01-11 17:43:03 +09:00
commit 2a804556db
Signed by: nishi
GPG key ID: 27EF69B208EB9343
7 changed files with 165 additions and 50 deletions
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47
engine/src/client.c
View file

@ -18,10 +18,10 @@ GBClient GBClientCreate(GBEngine engine) {
client->look_at[1] = 0;
client->look_at[2] = 0;
client->light0[0] = 0;
client->light0[1] = 1;
client->light0[2] = -5;
client->light0[3] = 1;
client->light0[0] = 5;
client->light0[1] = 5;
client->light0[2] = 5;
client->light0[3] = 0;
client->gl = GBGLCreate(client);
@ -56,13 +56,44 @@ static void scene(void) {
glRotatef(180 * i, 0, 1, 0);
glBegin(GL_QUADS);
glNormal3f(-1, 0, 0);
glVertex3f(-1, 0.5, 0);
glVertex3f(-1, 0, 0);
glVertex3f(1, 0, 0);
glVertex3f(1, 0.5, 0);
glVertex3f(-1, 0.5, 0.25);
glVertex3f(-1, 0, 0.25);
glVertex3f(1, 0, 0.25);
glVertex3f(1, 0.5, 0.25);
glEnd();
glPopMatrix();
}
glBegin(GL_QUADS);
glNormal3f(0, 1, 0);
glVertex3f(-1, 0.5, -0.25);
glVertex3f(-1, 0.5, 0.25);
glVertex3f(1, 0.5, 0.25);
glVertex3f(1, 0.5, -0.25);
glEnd();
glBegin(GL_QUADS);
glNormal3f(0, 1, 0);
glVertex3f(-1, -0.5, 0.25);
glVertex3f(-1, -0.5, -0.25);
glVertex3f(1, -0.5, -0.25);
glVertex3f(1, -0.5, 0.25);
glEnd();
glBegin(GL_QUADS);
glNormal3f(-1, 0, 0);
glVertex3f(-1, 0.5, 0.25);
glVertex3f(-1, 0.5, -0.25);
glVertex3f(-1, 0, -0.25);
glVertex3f(-1, 0, 0.25);
glEnd();
glBegin(GL_QUADS);
glNormal3f(1, 0, 0);
glVertex3f(1, 0.5, -0.25);
glVertex3f(1, 0.5, 0.25);
glVertex3f(1, 0, 0.25);
glVertex3f(1, 0, -0.25);
glEnd();
}
void GBClientStep(GBClient client) {

47
engine/src/gl_shadow.c
View file

@ -1,5 +1,7 @@
#include <GearBox/GL.h>
#include <GearBox/Math.h>
#define SHADOW_WIDTH 1024
#define SHADOW_HEIGHT 1024
@ -24,8 +26,9 @@ void GBGLShadowInit(GBGL gl) {
if(GBGLShaderPrepare(gl, &gl->shadow_shader, "base:/shader/shadow.vs", "base:/shader/shadow.fs")) {
glUseProgram(gl->shadow_shader);
glUniform1i(glGetUniformLocation(gl->shadow_shader, "depth_texture"), 1);
glUniform1i(glGetUniformLocation(gl->shadow_shader, "depth_texture"), 7);
glUniform1i(glGetUniformLocation(gl->shadow_shader, "current_texture"), 0);
glUseProgram(0);
}
}
@ -39,11 +42,13 @@ void GBGLShadowBeforeMapping(GBGL gl) {
glMatrixMode(GL_PROJECTION);
glGetDoublev(GL_PROJECTION_MATRIX, gl->shadow_old_projection);
glLoadIdentity();
GBGLPerspective(gl, SHADOW_WIDTH, SHADOW_HEIGHT);
glGetDoublev(GL_PROJECTION_MATRIX, gl->shadow_projection);
glMatrixMode(GL_MODELVIEW);
glGetDoublev(GL_MODELVIEW_MATRIX, gl->shadow_old_modelview);
glLoadIdentity();
GBGLPerspective(gl, SHADOW_WIDTH, SHADOW_HEIGHT);
GBGLLookAt(gl, gl->engine->client->light0, zero);
glGetDoublev(GL_MODELVIEW_MATRIX, gl->shadow_modelview);
@ -52,11 +57,24 @@ void GBGLShadowBeforeMapping(GBGL gl) {
glDisable(GL_LIGHTING);
#ifdef SHADOW_CULL
glCullFace(GL_FRONT);
#else
glDisable(GL_CULL_FACE);
#endif
glPolygonOffset(1.1f, 4.0f);
glEnable(GL_POLYGON_OFFSET_FILL);
}
void GBGLShadowAfterMapping(GBGL gl) {
glActiveTexture(GL_TEXTURE1);
GBMatrix4x4 in, out;
GLdouble mat[16];
int i;
glDisable(GL_POLYGON_OFFSET_FILL);
glActiveTexture(GL_TEXTURE7);
glBindTexture(GL_TEXTURE_2D, gl->shadow_texture);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, SHADOW_WIDTH, SHADOW_HEIGHT);
glBindTexture(GL_TEXTURE_2D, 0);
@ -65,7 +83,11 @@ void GBGLShadowAfterMapping(GBGL gl) {
glViewport(0, 0, gl->engine->width, gl->engine->height);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glEnable(GL_LIGHTING);
#ifdef SHADOW_CULL
glCullFace(GL_BACK);
#else
glEnable(GL_CULL_FACE);
#endif
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
@ -75,33 +97,42 @@ void GBGLShadowAfterMapping(GBGL gl) {
glLoadIdentity();
glMultMatrixd(gl->shadow_old_modelview);
glActiveTexture(GL_TEXTURE1);
glActiveTexture(GL_TEXTURE7);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
for(i = 0; i < 16; i++) in[i] = gl->shadow_old_modelview[i];
GBMathInvert4x4(out, in);
for(i = 0; i < 16; i++) mat[i] = out[i];
glTranslated(0.5, 0.5, 0.5);
glScaled(0.5, 0.5, 0.5);
glMultMatrixd(gl->shadow_projection);
glMultMatrixd(gl->shadow_modelview);
glMultMatrixd(gl->shadow_old_modelview);
glMultMatrixd(mat);
glActiveTexture(GL_TEXTURE0);
glMatrixMode(GL_MODELVIEW);
glActiveTexture(GL_TEXTURE1);
glActiveTexture(GL_TEXTURE7);
glBindTexture(GL_TEXTURE_2D, gl->shadow_texture);
glEnable(GL_TEXTURE_2D);
glActiveTexture(GL_TEXTURE0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(gl->shadow_shader);
}
void GBGLShadowEnd(GBGL gl) {
glActiveTexture(GL_TEXTURE1);
glUseProgram(0);
glActiveTexture(GL_TEXTURE7);
glDisable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
glActiveTexture(GL_TEXTURE0);
glActiveTexture(GL_TEXTURE1);
glActiveTexture(GL_TEXTURE7);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glActiveTexture(GL_TEXTURE0);

31
engine/src/math.c
View file

@ -72,3 +72,34 @@ void GBMathNormal3x4(GBVector3 r, GBVector3 v0, GBVector3 v1, GBVector3 v2, GBVe
double GBMathCot(double x) {
return (double)1 / tan(x);
}
void GBMathInvert4x4(GBMatrix4x4 out, GBMatrix4x4 in) {
double inv[16], det;
int i;
inv[0] = in[5] * in[10] * in[15] - in[5] * in[11] * in[14] - in[9] * in[6] * in[15] + in[9] * in[7] * in[14] + in[13] * in[6] * in[11] - in[13] * in[7] * in[10];
inv[4] = -in[4] * in[10] * in[15] + in[4] * in[11] * in[14] + in[8] * in[6] * in[15] - in[8] * in[7] * in[14] - in[12] * in[6] * in[11] + in[12] * in[7] * in[10];
inv[8] = in[4] * in[9] * in[15] - in[4] * in[11] * in[13] - in[8] * in[5] * in[15] + in[8] * in[7] * in[13] + in[12] * in[5] * in[11] - in[12] * in[7] * in[9];
inv[12] = -in[4] * in[9] * in[14] + in[4] * in[10] * in[13] + in[8] * in[5] * in[14] - in[8] * in[6] * in[13] - in[12] * in[5] * in[10] + in[12] * in[6] * in[9];
inv[1] = -in[1] * in[10] * in[15] + in[1] * in[11] * in[14] + in[9] * in[2] * in[15] - in[9] * in[3] * in[14] - in[13] * in[2] * in[11] + in[13] * in[3] * in[10];
inv[5] = in[0] * in[10] * in[15] - in[0] * in[11] * in[14] - in[8] * in[2] * in[15] + in[8] * in[3] * in[14] + in[12] * in[2] * in[11] - in[12] * in[3] * in[10];
inv[9] = -in[0] * in[9] * in[15] + in[0] * in[11] * in[13] + in[8] * in[1] * in[15] - in[8] * in[3] * in[13] - in[12] * in[1] * in[11] + in[12] * in[3] * in[9];
inv[13] = in[0] * in[9] * in[14] - in[0] * in[10] * in[13] - in[8] * in[1] * in[14] + in[8] * in[2] * in[13] + in[12] * in[1] * in[10] - in[12] * in[2] * in[9];
inv[2] = in[1] * in[6] * in[15] - in[1] * in[7] * in[14] - in[5] * in[2] * in[15] + in[5] * in[3] * in[14] + in[13] * in[2] * in[7] - in[13] * in[3] * in[6];
inv[6] = -in[0] * in[6] * in[15] + in[0] * in[7] * in[14] + in[4] * in[2] * in[15] - in[4] * in[3] * in[14] - in[12] * in[2] * in[7] + in[12] * in[3] * in[6];
inv[10] = in[0] * in[5] * in[15] - in[0] * in[7] * in[13] - in[4] * in[1] * in[15] + in[4] * in[3] * in[13] + in[12] * in[1] * in[7] - in[12] * in[3] * in[5];
inv[14] = -in[0] * in[5] * in[14] + in[0] * in[6] * in[13] + in[4] * in[1] * in[14] - in[4] * in[2] * in[13] - in[12] * in[1] * in[6] + in[12] * in[2] * in[5];
inv[3] = -in[1] * in[6] * in[11] + in[1] * in[7] * in[10] + in[5] * in[2] * in[11] - in[5] * in[3] * in[10] - in[9] * in[2] * in[7] + in[9] * in[3] * in[6];
inv[7] = in[0] * in[6] * in[11] - in[0] * in[7] * in[10] - in[4] * in[2] * in[11] + in[4] * in[3] * in[10] + in[8] * in[2] * in[7] - in[8] * in[3] * in[6];
inv[11] = -in[0] * in[5] * in[11] + in[0] * in[7] * in[9] + in[4] * in[1] * in[11] - in[4] * in[3] * in[9] - in[8] * in[1] * in[7] + in[8] * in[3] * in[5];
inv[15] = in[0] * in[5] * in[10] - in[0] * in[6] * in[9] - in[4] * in[1] * in[10] + in[4] * in[2] * in[9] + in[8] * in[1] * in[6] - in[8] * in[2] * in[5];
det = in[0] * inv[0] + in[1] * inv[4] + in[2] * inv[8] + in[3] * inv[12];
if(det == 0)
return;
det = 1.0 / det;
for(i = 0; i < 16; i++)
out[i] = inv[i] * det;
}