int main(int ac, char **argv, char **env)
{
if (ac < 2)
{
printf("Usage: %s EXPR\n", argv[0]);
printf("we using env for value mapping\n");
exit(-42);
}
map_t mapping = createMap(env);
int res = 0;
if (exprEval(&argv[1], mapping, &res))
{ printf("%d\n", res);}
}
void render_glslshaderbind()
{
varFloat* vfloat;
varVec2* vec2;
varVec3* vec3;
varVec4* vec4;
varSampler2D* sampler2D;
int i;
double d;
local = (glslshaderbind_section*) mySection->vars;
// Choose the proper program shader
glslshad_bind(local->program);
for (i = 0; i < local->vfloat_num; i++)
if (local->vfloat[i].loc>-1) {
vfloat = &(local->vfloat[i]);
insertSectionVariables(&vfloat->eva);
vfloat->eva.err = exprEval(vfloat->eva.o, &vfloat->eva.result); // Evaluate the equations
// Check for errors
if(vfloat->eva.err != EXPR_ERROR_NOERROR) section_error("glslshaderbind: [vfloat] Expression evaluation Error (%d): %s", vfloat->eva.err, vfloat->eva.equation);
// Retrieve the values and assign them
exprValListGet(vfloat->eva.v, "v1", &vfloat->value);
glUniform1f(vfloat->loc, (float)vfloat->value);
}
for (i = 0; i < local->vec2_num; i++)
if (local->vec2[i].loc>-1) {
vec2 = &(local->vec2[i]);
insertSectionVariables(&vec2->eva);
vec2->eva.err = exprEval(vec2->eva.o, &vec2->eva.result); // Evaluate the equations
// Check for errors
if(vec2->eva.err != EXPR_ERROR_NOERROR) section_error("glslshaderbind: [vec2] Expression evaluation Error (%d): %s", vec2->eva.err, vec2->eva.equation);
// Retrieve the values and assign them
exprValListGet(vec2->eva.v, "v1", &d); vec2->value[0] = (float)d;
exprValListGet(vec2->eva.v, "v2", &d); vec2->value[1] = (float)d;
glUniform2fv(vec2->loc, 1, (GLfloat*)vec2->value);
}
for (i = 0; i < local->vec3_num; i++)
if (local->vec3[i].loc>-1) {
vec3 = &(local->vec3[i]);
insertSectionVariables(&vec3->eva);
vec3->eva.err = exprEval(vec3->eva.o, &vec3->eva.result); // Evaluate the equations
// Check for errors
if(vec3->eva.err != EXPR_ERROR_NOERROR) section_error("glslshaderbind: [vec3] Expression evaluation Error (%d): %s", vec3->eva.err, vec3->eva.equation);
// Retrieve the values and assign them
exprValListGet(vec3->eva.v, "v1", &d); vec3->value[0] = (float)d;
exprValListGet(vec3->eva.v, "v2", &d); vec3->value[1] = (float)d;
exprValListGet(vec3->eva.v, "v3", &d); vec3->value[2] = (float)d;
glUniform3fv(vec3->loc, 1, (GLfloat*)vec3->value);
}
for (i = 0; i < local->vec4_num; i++)
if (local->vec4[i].loc>-1) {
vec4 = &(local->vec4[i]);
insertSectionVariables(&vec4->eva);
vec4->eva.err = exprEval(vec4->eva.o, &vec4->eva.result); // Evaluate the equations
// Check for errors
if(vec4->eva.err != EXPR_ERROR_NOERROR) section_error("glslshaderbind: [vec4] Expression evaluation Error (%d): %s", vec4->eva.err, vec4->eva.equation);
// Retrieve the values and assign them
exprValListGet(vec4->eva.v, "v1", &d); vec4->value[0] = (float)d;
exprValListGet(vec4->eva.v, "v2", &d); vec4->value[1] = (float)d;
exprValListGet(vec4->eva.v, "v3", &d); vec4->value[2] = (float)d;
exprValListGet(vec4->eva.v, "v4", &d); vec4->value[3] = (float)d;
glUniform4fv(vec4->loc, 1, (GLfloat*)vec4->value);
}
for (i = local->sampler2D_num-1; i>=0; i--)
//for (i = 0; i<local->sampler2D_num; i++)
if (local->sampler2D[i].loc>-1) {
sampler2D = &(local->sampler2D[i]);
glActiveTexture (GL_TEXTURE0 + i);
glBindTexture(GL_TEXTURE_2D, sampler2D->texGLid);
}
for (i = 0; i < local->matrix4x4_num; ++i)
if (local->matrix4x4[i].m_ShaderUniformID>-1) {
// cal->matrix4x4[i].m_ShaderUniformID -> Shader Uniform Variable ID
// 16 -> 4x4 floats, 16 elements
// 0 -> do not transpose
// request to the engine the matrix value and pass it to the shader
glUniformMatrix4fv(local->matrix4x4[i].m_ShaderUniformID, 16, 0, (GLfloat*)get_sve_variable_matrix_4x4f(local->matrix4x4[i].m_SVEVariableID));
}
}
